TweakGuides.com posted a tweak guide for Mass Effect
A quote from the article:
>> Mass Effect Tweak Guide
I've released the Mass Effect Tweak Guide, firstly to make sure that everyone understands all the in-game settings, but more importantly, so that all the major advanced tweaks which allow further optimization and customization of both graphics and gameplay can be documented in the one location. The guide is rounded out with a range of troubleshooting tips and other information which should be of great use to Mass Effect players.
>> Mass Effect Tweak Guide