[monkeygod]

Yep, post 3 on that thread for relocking your device when you need to send it in for warrant or take it to the Sprint Store to be looked at. As far as the rest, it's probably best if one of the more experience members here provide you with the answers as it could get complicated.

As far as installing software, just used file explorer (in your Tool Folder) to install the cabs (most of the apps will give you the option of either installing it on your device or sd card).