It needs to be flashed. Here's a page outlining the general process. You can find more info by doing a search, maybe look for threads on Howard Forums.

Understand that this can brick your phone, so it's at your own risk. However, if the Tour is unusable to you right now, you don't have much to lose ... except you could sell this one and buy a Verizon model.

http://mark.cdmaforums.com/HowToFlash.htm

Good luck! Let us know if you try it.