Team Underdog released a FAQ, Xtreme ISO convert tutorial (the NME-360 mod will not work with a standard 'Xtreme-image', the Security Sector (SS) patch is different apparenly) and the diagrams for the Toshiba-Samsung drive for their NME-360(info) device, a chip that will allow to patch the DVD firmware of the Xbox 360 drive 'on-the-fly' only when needed (so not for original x360 discs):

Added a small FAQ and a little tutorial about how to make Xtreme Images work with the NME-360 Modchip to the HOW-TO Section. Also added the installation diagrams for Samsung drives which you can see as a quicky as we are working out some alternative points so you won't need to scratch off the ugly glue. Oh and we see people discussing about the compatibility of our chip to the Hitachi drives because the diagram stated the 47DH drive. We just want to confirm that our chip works with all currently available Hitachi drives. No matter if 46 DH, DJ or 47 DH, DJ. We deleted the small misleading in the Hitachi diagram.

Frequently Asked Questions:
* Q:Will NME360 work with my drive?
A:Yes! If you have Hitachi/LG or Toshiba/Samsung drive
* Q:Is it hard to install?
A: Not for experienced technicians, anyway the Samsung drive is much easier.
* Q: What is the difference between NME-360 compared to the Xtreme bios mod
A: First of all we think that our code is cleaner and more sofisticated. NME 360 is an intelligent chip, NME automatic switches itself off if you play an original game, there for you don´t need any external switch whatsoever. No need to have dual firmwares , no need to read out any keys from the drive and no chance to brick your drive.
* Q: Can I play Xbox Live with NME 360
A: Yes you can! When you play original games NME 360 will not patch anything, so the drive is like original unmodified. We recommend that you DON`T play backups on live, due to the risk of being banned.
* Q :What kind of media should I use?
A:You need to use dual layer media, we have found that Verbatim DVD+R DL is the best to do backups on and it´s REALLY important that you use good media.
* Q:Do I need to tweak my laser?
A:If you have Hitachi/LG drive you should tweak it, specially the 47DJ drive. Check tutorials for how to.

Tutorial to convert an Xtreme image to make it work with the NME-360 modchip: click here

Official Site: http://www.team-underdog.com/"