How do I tell a drive that it is now hda? (aka, the main drive.) I installed Gentoo on the drive while it was in the hdb slot but I want to explain to it that it should be hda; however it is still slightly incomplete (no grub on it yet). Once it is firmly reognizing itself as hda, I then want to install grub and get it to dual boot with the (now secondary) Vista drive, which shouldn't be a problem.
For some reason, when rebooting and running from the livecd, it is recognized as hdb, and this I have no clue how to fix.

