How do I set up a Mogul for Navizon W/O cell service?

I have a Sprint Mogul ( PPC6800 ) with the STOCK WM_6.1 rom.
It is no longer in service on my cell plan. I would like to use it as a dedicated PDA/Navizon device.
One problem is it keeps trying to dial 777 or what ever for data repeatedly.
How do I or what changes do I change to make it useful for Navizon data collection?
I've tried to just turn the phone OFF ( Hold down the red call end button) but it doesn't collect any AP or Cell ( I assume because the radio is off?) data. It doesn't even start to count them. Like it doesn't even get to the 0 AP - 0 Cell. That line/row stays blank.
Any suggestions? Anyone use a Mogul for just Navizon with out cell phone service? How do you do it?
Also, how would I SYNC the data once I collect it? I assume I'd have to connect to the internet via wifi.
Thanks,
Josh