Help converting Xbox original game to be iXtreme compatible (for Xbox 360)

Hey, okay so I have a Star Wars Battlefront 2 iso for Xbox original.

As you can see this is the file when viewed in XDvdMulleter:

https://www.dropbox.com/s/3epvalla4jgmb9w/Untitled.png?dl=0

I have donloaded the SS, DMI and PFI files for the game and also the Video file and Layout.

I rebuild a DVD9 ISO with these files inserted.
The issue is once this new ISO is created the ISO is still not iXtreme compatible and has also lost its random padding.

What should I do to convert this Xbox original game to be iXtreme compatible?

- Many thanks.