I'd forgotten that I had Synctoy setup to just copy new and updated files, which would have saved so much time. But instead, I just copied the whole directory. Stupid.
It's given me a bit of time to do some tidying though, done a bit of cable organising behind my desk. On the cheap, too - I didn't want to pay for cable trays and stuff, so I stapled wire twists to the underside of my desk and used that. Seems to be working quite well so far.
Might be a long night if I want 7 installed by tomorrow...
Edit: seems Vista doesn't want to let me shrink my partition by more than 98mb. Going to bed, I'll sort it out tomorrow.