Sounds like you are trying to get the classic Outlook/Inbox style SMS instead of the threaded SMS. I don't have a Touch Pro 2, but I would assume you would be able to do the same things that were done before with 6.1. There is a registry key that you can add or just install these programs to make the change for you:
http://freewareppc.com/communication/smstweaker.shtml
http://www.mydigitallife.info/2008/0...ows-mobile-61/
I'm running a custom 6.5 rom for the Touch Pro and it works on it. Hopefully it'll work on yours too. Good luck!