BIOS Dumping

Dumping a BIOS can be done in several ways.

Using a chip reader

The BIOS is an ordinary TSOP and can be read with an ordinary TSOP reader.

Using a softmod exploit

Using a softmod exploit, you can usually choose to 'backup' your Xbox. This dumps a load of information to E:\Backup, including the BIOS. You can then FTP into your Xbox and retrieve it.