Wirelessly posted (htc Pocket PC: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 8.12; MSIEMobile6.0) Sprint T7380)
I was under the impression that all you needed to do was put your device in GSM only mode and insert a pre-paid SIM card for the GSM carrier there and you should be good to go there.
You may need to call Verizon for an unlock code to unlock your SIM slot if you haven't already.