Not to ghost, but to just put storage stuff on there...
But on second thoughts - it will most likely be a faster hard drive...
Installing windows on the drive in the old computer MIGHT work...but rarely does because of the change in motherboard and may result in a
BSOD.
It should only take an hour or so to install windows with all the drivers and what not.
Having your old 30gb drive as a slave will not cause any conflicts.