So i've been looking around for this with not much luck.
It's a Microsoft Internal disc that is used for stress testing Xbox 360s at extreme levels to rule out if the console will face or will not face another RROD.
What the disc does is play levels from Project Gotham Racing at intense levels stressing the CPU/GPU/DiscDrive/Network/etc of Xbox 360s.
Apparently the disc was left in a repaired RROD Xbox 360 that was sent back home to the owner from the Microsoft Repair Center. The disc would later go on to be ripped onto torrent sites. I am downloading from a torrent but unfortunately, it's a dead end as there are only peers and not seeders.
Does anyone have a copy they can ftp or upload somewhere?