Yuri's Revenge freezing

[khataran9]

Hello, my computer (AMD1.2 512mg ram XP Corp.) keeps freezing about 35 minutes into a skirmish. I am trying to apply a no-cd crack to see if it's any better. I have tried bOZEr and the 1.001v file here, with no luck. What am I doing wrong? I start with a fresh load of RA2 on the C: drive, then Yuri's Revenge updates it, before loading itself. I've tried coping the mix and .dsk files from the cd before patching and after. Then I replace the gamemd file. What am I missing?

Or, why is my normal installation freezing?