I have no idea, but I mod Halo 1 and Halo 2, and I was going to post a topic on just this, but the e:/cache would not be something you would want to delete, those are the cache that over a while xbox live develops and edits for the best connections or xbl and other xbl settings. Unless you don't intend on going live, go for it. It can be quite risky deleting these cuz for some peoples connections it can cause quite the lag if it has to recreate these. Although the x, y, and z cache directories would be helpful to have an app out there to delete them. If I knew how the hell to make xbox apps I would be all over it, I know you need XDK and I do believe that that is illegal to get ahold of. If not or anyone knows where to ind such xbox app creating programs, please just continue posting.