http://forum.xda-developers.com/showthread.php?t=607809
Was able to tether my pspgo to my fuze with natf's wm 6.5 rom. It has BT DUN profile built in so no need for pdanet. Only thing is after disconecting you need to manually kill the data connection on the phone to reconnect the psp go to the phone again. Other wise, a working solution for windows mobile touch pro owners on att. You can probably replace *99# with the settings for your specific carrier.
Using that exact rom version, it stays connected until I disconnect it.
junsinco1 2 months ago