X-Bios has another update for you folks having problems. Here it is BIOS Editor v0.91A.

Here's what's new:

1. Fixed saving modified GPU and Memory values for GeForce 2 series
2. Changed way to retrieve current BIOS
3. AGP 4x removed
4. FastWrites removed
5. Now program can detect mobile bioses
6. Show information about TV code

Remember that this is a beta version! Send some bugs reports.