I downloaded NETWORK and my phone showed up as already set to CDMA auto PRL, but I went through the steps anyway just to make sure.
Network still shows GSM and GPRS in service.
Did you remember to hit menu> change radio band after you switched to CDMA auto PRL? and did you get booted out of network? You need to get booted out to ensure that the change took place.
My network shows CDMA evdo Rev A