i dont think anyone will be able to do it. Just like poutlook in wm6, its hard coded into the rom, so i think that the 6.1 threader is also hard coded into the rom. I could be wrong but weve all asked this question a million times, and none of us can seem to get an answer...but LOOK check this out, im about to try it now....
http://iwindowsmobile.com/contact-manager.html.
a couple people here have tried it and say it rocks. I think by the end of today this forum will be overran with people talking about this app