After you flash your TP to metro pcs, then get the Ryan Mogul cab- this will help you get the internet and picture messaging going on your Touch Pro... here is the link to the cab:
http://www.4shared.com/file/98051692...rogrammer.html
Here is the link (XDA Developers) to read on how to set up, read post 3:
http://forum.xda-developers.com/showthread.php?t=501754
Do give thanks or donate to Ryan if it helped you...
Good luck...