you may want to do some research on it first prior to installing. a lot of people have issues with it. there's plenty of other ways to safely root your phone...read this first. it should help you understand what you're doing to your phone so you can undo it when the time comes, and it will come...lol.
http://www.droidforums.net/forum/droid-x-hacks/99958-rooolers-guide-root-backup-roms-2-2-ota.html
So, once ur Rooted...What are some things you should not do?
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