esta en ingles pero yo creo q se entiende bien:
1) Making a bios disk using Nero or a similar burning software
You can use Nero or an other software to burn the disk but just make
sure that you select the same options.
Select a 256k bios file of your choice and rename it as bios.bin. You
will also need a ‘dummy file’ to pump up the space burned on your
CDRW to make it more ‘readable’ by your Xbox drive. Use any file of
about 50 Mb and rename is as ZZZ.ZZZ for example. Just make sure
that you don’t rename it as a bios file.
You are now ready to make a new compilation in your burning
software. Select the following options: