Do the mods work with the gog game? Like the Ultimate difficulty mod? Improved textures etc?
I had so many problems running T1 and 2 on Win7 I made a dual boot for XP dedicated to Thief. Also - that meant there were no more conflicts between newer video codecs and the Thief friendly ones. Works like a dream but I have to reboot to play. A tiny price to pay!
I have played T1Gold, T2, T2X, CoSaS, many other FMs and TDS. I still play T2 and FMs today. When I am dying I will look back at how little I have done with my life and be glad at how much fun it was.