[whitey10tc]

I can tell you it can be done. But not with QPST You will need a licensed copy of CDMA work shop. Sorry I won't link but google is a good start, the trial version and cracked copies won't cut it.
You will need to send a correct password,rewrite some NV files, make the changes in the EVDO tab, Save all the setting then reset the phone. Then you should have the 3g/EVDO symbol and then you will then need to make some changes on the phone, mainly in the registry and the data connections.

But that's a start for you.