Motorola Droid X :: How To Revert Back To Stock For OTA

For the Droid X i want to try to use the froyo update that was leaked before however, I am worried about as to whether or not I can flash back to the stock OS. I see how to do it for other phones and know how to do it for the original droid with much help however, I do not want to do the update until I know there is a way to revert back to 2.1 Also I am using the leaked NON ROOTED 2.2 update if I get an answer on here. I do not like to root only because I am a noob.