as far as I know it allows you to load a devkit with the dev dash, default dash, or both, and is of no use to you unless you happen to have an actual 360 dev kit.
it's one of those things that fall into the category of "if you don't know what it is or what it does it's probably useless to you".
Likot Mosuskekim, Woodcutter cancels Sleep: Interrupted by Elephant.