Still no dice yet...
Other stuff I've tried (all followed with install attemps of 64 bit):
1) Updated the BIOS to latest ver., reset to default settings
2) Tried switching my SATA drives to AHCI.
3) Tried installing with 1 DIMM, tried with one or the other in different banks.
4) Tried installing in Low res
5) Tried installing in Safe Mode
Just to clarify... what happens when I install is the following:
1) Everything goes fine until the first reboot.
2) System reboots, boots from the drive.
3) Goes through from "Setting up registry settings"
4) Continues the installation and displays the "Completing installation..." animation
5) The screen flickers once and then flickers again only to display a black screen with a flashing/flickering white cursor at the top left of the screen and everything is locked up (Only reboot makes it go away

). As it has been displayed in other forums though, I DO NOT have free movement of the mouse...
Just posting in case there might be others with the issue.