Allright, I had the CDs years ago when I was about nine or ten. :3
They disappeared one by one before I ever got to fully enjoy the game.
I am indeed using virtual CDs, and I would buy this game from GOG as well.
The virtual CDs found their way to my computer before I found out where to buy the game online (the links I posted here earlier).
The game is indeed installed under "Program Files (x86)", I might try again under a shorter path. You say you have a dedicated folder, does that mean you have a folder being excluded from the whole Windows security check system?
@aluinie: Yes the project seems to have a high level of activity. Funny, I happened to find it while searching for IG1 music, too.
Open-IG1 worked fine for me and is the closest I have been IG1 yet (never thought about the game before I heard the music online).
Edit: I tried the virtual CDs with and without the patches, on my XP machine - the results were the same regarding the Design button. Obviously the problem is lack of proper original CDs, I am sure.
Post edited January 25, 2012 by Bravado