1. That was dumb. If you wanted to flash a VGA bios, why didn't you come back to ask someone which bios to use? A suitable VGA bios would have been X2 5035 or iND 5003
2. Not sure what your options are as I don't know much about debug bios'. Try downloading, burning, and booting a rescue CD, such as Hexen and hope that it boots. If it does, use that to flash one of the bios files I have noted above. If it doesn't boot, you may have to buy or build a modchip.
EDIT: Maybe Heimdall can comment here.
This post has been edited by xboxmods2977: Feb 20 2012, 07:30 PM