Wait a minute... I think I got it all wrong:S
My point was, that I want to use my new HDD as a main one and ditch the older one, not to just create a backup for some cases. You see, I don't wanna re-install windows and all my files to there, I just wanna copy EVERYTHING(settings, files, save games etc.) to the new disk...
Aahhh... I'm confused...