Expect any compatibility issue with previous arcanum installs? (clean install? old patches, Saved games, WIP6.0 etc etc)
The new installer is currently programmed like this:
-- Check the CRC checksum of Arcanum1-3.dat files, if the same as English vanilla then:
-- Nuke everything but the said DATs, the DATs in \modules and movies
-- Then the installer re-applies the official 1.0.7.4 update, adds music in a much better quality, etc
Yes, you will be warned that the installer is going to wipe all your mods and save games and asked if you still wish to proceed.
Basically it's kinda like those Doom/Quake source ports where you only need the original WADs/PAKs. So it doesn't matter at all if you have A:WIP or even some localization patch installed. As long as Troika's original DATs are intact then it will be updated to vanilla UAP 2.0.
This is done because your old save games won't even load with the new UAP (too many engine changes) and as for mods, I've mentioned in another thread that Arcanum is not very modular, and unless one is very careful with adding content, then some issues are bound to rear their ugly head. Sure you can try adding w/e mods after the UAP install is complete, but I want you to experience the clean version first.