How to Internet/MMS on TMobile US?

I'm an experienced Windows ROM guy and recently switched to TMobile for the HD2.  My daughter has the Impression and I'm struggling to get it working full function.
Had it carrier unlocked, got tkfe to connect, got the master key, and have what connection settings i need for tmobile.  This is pretty much where I've hit a wall and can't find similar posts.
I went in the regular phone menu and created a separate non-att network connection, but how to get mms and medianet (or Opera when i figure how to install that) to use that connection is beyond me.  Any help is appreciated!  (even with my HD2 I'm sometimes jealous of my daughter's phone, the thing works like a charm)

Geez, yeah another search brought this one http://www.samsung-impression.org/index.php?topic=2469.0
Works like a charm.  I didn't even need to install total commander and edit the registry'  nice.