Evo X.
Tips
MOST IMPORTANT - DO BACKUP C: & E: drives to your PC first before changing anything on the xbox hard drive.

if you xbox refuses to boot Evo X DVDr then add dummy files to the iso.
Using iso builder extract the EVO X iso then inside the iso directories then add a new directory called dummy and copy about 200-500meg inside theat dummy directory.
Rebuild ISO using an iso builder. Reburn ISO and presto you should find your xbox boots EVO X first time (use good branded media)

Running from DVDr instead of the hard drive.
If you code your menu.ini file on the Evo X as the following you can have a bootable EVOX from DVDr but with the games running from hard drive.
example
make a directory called 1 - 2 - 3 - 4 on the xbox E drive then copy games to said directories.
then just make the menu.ini file located those directories as 1 - 2 - 3 -4
every time you boot from EVO DVDr you get a menu screen with say 1 - 4 options just select one and what ever is in that directory it will load (default.xbe is always the executable file in a directory.

More EVo X tips soon