In post #8, you asked if you should burn both the Plus and the non plus Bios on the disk, right?
If this is what your're asking, the answer is NO.
Burn the Plus Bios file if you have a Ver. 1.6 Xbox and
a Dummy file to a cd.
If you have a ver. 1.0 to 1.5 burn the regullar Bios file and a dummy file to the cd.