I just stumbled across this thread and gave it a shot. Sirius is working for me on Sprint branded TP2 running Reflectionist's 6.5 ROM.
Link:
http://forums.geekstoolbox.com/showthread.php?t=25946
I'm not taking credit for the app, but definitely wanted to share the news...
How about if you try it, you post whether or not it worked and on which ROM to help everyone else out too?