Cemetric: It doesnt matter, I change the BIOS setting to 40 GB hd 1st, but it hangs during booting, because of motherboard change. I installed winxp, win2000 on 80GB hd after the motherboard change (they boot with no prob), and i didnt make a floppy for linux.

Gore: i have boot loaders on both hdds, but the prob is that the winxp winme, linux (on 40 GB one) where installed using the old motherboard, now i changed the motherboard, they hang during booting.
--thanks guys