So, with a bit of advice and some of the utilities and emulators provided by flyingjohn, I was able to finally comprehend Mac emulation enough to get every game I wanted to try to work. This is going to be a some what long post; I am posting it both to help anybody else who may be struggling with getting these games to run as well as to record the process by which I got it to work for my own future reference because my memory is unfortunately very weak. Thank you very much,
So at first I'd installed Mini vMac and got some of the older black and white games to run using OS 6.0.8 with the necessary system disk, ROM file and a blank disk taken from an archive that I was able to source myself before looking at the package from the recommended emulation thread, as detailed in my previous post. I used a copy of a 024M blank disk for the virtual drive and after expanding a copy of the 6.0.8 system disks with StuffIt on Windows in Explorer I installed the OS to the blank disk by dragging and dropping the System Startup and System Additions disk images right onto the running emulator when prompted. Since the older games are such small file sizes it left me with plenty of room, so I made a new "Games" folder on the aforementioned virtual drive and started copying the disk images for the games I downloaded to it. I added the StuffIt expander to it, as well as ImportFl and ExportFl but found that in most instances the game disk images I was using sufficed by simply dragging and dropping to the desktop and then moving them to my Games folder. Having all of the older CRPGs I'm currently interested in available in one folder on the virtual drive within vMac is very convenient; I simply start the emulator and open that folder then double-click on whichever game executable I wish to run.
I'm attaching screenshots below of some of the games but to share they are the Gold Box AD&D games, the MacVenture series games, all of the Wizardry series I could find Mac copies of (so Wizadry 1, 2 and 6 because 7 isn't compatible with System 6), The Dungeon of Doom and The Dungeon Revealed, the first Bard's Tale (does anybody know if the second and third games have Mac versions?), Breach, Might and Magic 1 through 3, Scarab of Ra, Quarterstaff: The Tomb of Setmoth, Citadel of the Dead, Citadel: Adventure of the Crystal Keep, King's Bounty, Alternate Reality: The City, Ultima II and Ultima III, Legends of the Lost Realm and its sequel scenario, then Dark Castle and Return to Dark Castle. All of my games were sourced from:
https://macintoshgarden.org/ and I downloaded when available multiple versions of each game so that I could have the original installation disk images and .SIT files for Mini vMac, as well as the .ISO and .BIN files for the later color games.
But then last night I was encouraged by the success where I'd failed multiple times in the past (having been utterly unfamiliar with the Mac OS of any kind outside of the most basic functions) to see if I could manage to do the same thing but for the later games with color. So I installed Basilisk II and had it create a virtual hard disk at 500 MB, sourced a copy of the Mac OS 8.1 (
https://archive.org/details/MacOS_8_Version_8.1_691-1912-A_Apple_Computer_Inc._1998) and a copy of the Quadra 630 ROM (oddly I didn't find a copy of this within the Old World ROMs "1 MB" subfolder within the Firmware folder included in the emulation package provided by flyingjohn, though I most likely just I missed it because I did find copies of the 600 and 650, etc) which I downloaded and stored in a subfolder of the Basilisk install folder and renamed it to 630.ROM. In the Basilisk II GUI volume section I added the Mac OS 8.1 disk image and in the settings pointed the ROM directory to the 630.ROM, added my new virtual drive and then loaded Basilisk II for the first time, and it worked beautifully. I was able to install the OS 8.0.1 and it left me with somewhere just under 400 MB of space.
After I had the OS up and running I was a bit confused about how to add the different kinds of games, but initially I added ImportFl and the StuffIt expander. Adding the older black and white games and the less intense color games and/or variants was relatively simple, so I added all of the same games I had put on Mini vMac and copied to the disk and installed. There are some more newer games I downloaded that I didn't include in the list above, but it was basically a handful of colorized CRPGs and a handful of adventure games. However, I was very confused by games that required CDs to be mounted and threw myself at the problem for a while until I grasped the functionality of the GUI and the manner by which disk images are loaded. So after much frustration I finally figured it out; sourced an updated and patched version of World of Xeen and copied the .SIT file to the desktop, moved it to my new Game folder and went to unpack it but didn't have the room; another brick wall.
But then, as if a divine intervention descended upon my soul and lifted it up out of my body and off into the heavens, it occurred to me that I should in theory be able to add more than the one virtual drive... so with high hopes and determination I had Basilisk II create another virtual drive with the same 500 MB size, installed another Mac OS version on it with only the most minimal basic installation requirements, found a copy of then added the Virtual CD CD/DVD-ROM Utility, and then loaded up the emulator again. Lo and behold, I saw my mostly empty second virtual drive and the Virtual mount utility folder on the desktop, so using the "My Computer" folder also on the Basilisk II desktop I clicked-through my Windows C drive to where I store all of my downloaded Mac games folder and dragged and dropped the World of Xeen .SIT file over to this new drive, and unpacked it with StuffIt. Next I used the Virtual mount utility to mount a copy of the unpacked Install.DSK, but couldn't progress with it because I hadn't mounted the 5 or so Data disks and couldn't figure out how mid-installation! So I closed Basilisk II again, then added through the GUI directly the Install disk and all of the Data files along with the two virtual drives, relaunched the emulator and ran the Install disk and sure enough, it rapidly went through and installed the game! I moved it to another Games folder on the new second virtual drive, trash-canned the .SIF archive to clear up some memory and tested the game out and it worked flawlessly, beautiful vivid colors, awesome music and sound effects, and the toggleable options for full animation and other settings all worked. Since I dedicated basically the whole second drive to having a permanently installed copy of World of Xeen, all I have to do now to play it is mount the disk image which is saved to the virtual drive for convenience and double click the games executable icon and I'm good to go. I'm so happy that I finally figured this out! But regret now the absence of sleep, lack of dinner and back pain from sitting there all night and morning long demanding to figure this all out before stepping away.
So here are some screenshots of the two emulators running. The size of the emulator screen is unfortunately fairly small and the images are downsized, and with Mini vMac running System 6 (I also made an instance of vMac running System 7 for older games with color) I can use the CTRL + M keys command to make the emulators screen size double, but I haven't figured out how to increase the size of the screen in Basilisk II beyond the basic resolution and maintain aspect option settings from within the GUI. I need to check if there is a way to have it display either at a higher resolution or if it is possible to make it full screen in Windows without manually adjusting my monitor display resolution. I use a gaming laptop but it always remains closed and stuck inside a cooling unit with a fan beneath it, and have it connected to an external keyboard and mouse, and a widescreen external monitor, so it I don't like having to change the display every time I switch things up.