okay, if you cannot get back to flashbios all is not lost. What I would suggest you do is the following:
1) install a dashboard to your xbox
2) goto xbins and download the X3 3294 bios and flashX3 which is in the same folder as the bios. Flash X3 is an application which you can launch via your dashboard that will allow you to reflash your x3 chip. So install flashx3 onto your xbox hard disk.
3) use flashx3 to flash the x3 3294 bios to banks 1+2+3+4. Again there are two versions of the bios - one for 1.0 - 1.5 xboxes and one for 1.6's.