So, i have installed some games to my System (C:) drive, because at the time it was the only drive with enough space. Now i have new drive with plenty of space, so i want to move those games to that new drive.

Is it possible to move those games and get them work, if i change all the registry etc entries referring to that new drive/location?

Well..since I have lots of time on my hands, I took my Bus Driver Game (no laughing) and moved it to my E: and the game ran without a problem. Though I can't say for sure it would work on ALL games since some games don't always rely on information in your registry, there's a good chance it'll work. Try it out, worse comes to worse, transfer it back to your C:.

Abit AN8 Socket 939
AMD64 X2 4200 @2.4Ghz
Corsair 1Gig Dual-Channel 2x512
MSI Radeon x800 PCI-E
Seagate 160Gig SATA
WesternDigital 80Gig SATA
WesternDigital 160Gig SATA
Antec TC

I have done it quite a few times, what you want to do. It works most of the time.

I have formatted in the past too, booted up a game that is on another partiton and it works fine.

Hl2 didn't like the format so needed to reinstall it. Just make sure you always have a backup off your saves, whatever you do.

hmm i guess so