I'm also interested in this too. Been wanting to try out 6.5 rom but I like sense 2.1 more than the newer ones :S
edit: going to try that silence rom that was mentioned above if I can find a download link for it, the one's I found so far aren't working anymore
edit: found it, flash it and already going back to wm 6.1 :S I still don't like the startmenu on 6.5... I prefer the 6.1 start menu lol