RE: Dragging Mac OS X from one internal HD to another?
"We have a G5 tower with 2 internal HD (one 80gig and the other 150gig) and need to switch the internal drives around so the 150gig becomes the master drive running mac os x. Could I just drag all the mac os x files on the 80 to the 10 and switch the drives in the bays around? would this work?"
As others have already mentioned, just get ahold of SuperDuper.
You don't even have to buy it - the free "demo version" will do a "full clone" of one hard drive to another one and make it bootable.
You _can't_ simply "drag a System folder from one drive to another", as you once did with OS 9. OS X has numerous invisible files and folders that cannot be copied via the Finder.
SuperDuper is what you want.
- John