You need:

The xbox version of the game - or a disk image of it, anyway.

Noesis: http://www.richwhitehouse.com/index.php?content=inc_projects.php

This Noesis plugin: https://anonfiles.com/file/01d7b84def3000132bf82026281572d9 (extract to plugins/python)

Quickbms: http://aluigi.altervista.org/quickbms.htm

Use Quick BMS with this script: http://pastebin.com/wsL4zKym

To extract the archives from the disk.

Use Noesis to view and export the models and textures.