Sprint PPC6700: Rom Update? GPS help

[chronicwise]

I have a Sprint Pocket PC (6700)

Currently with these ROM settings...

Model PA10A1 Platform PocketPC
ROM version 3.50.00 WWE
ROM date 4/25/07
Radio version 1.27.00
Protocol version SNAZ-40306
Hardware version 0041
PRL vesion 20224
PRI version 1.14_003
Browser version MSIE 6.0



Can someone direct me to the appropriate download location for the approrpiate newer ROM I should without doubt upgrade to?

RIght ROM for the device / carrier, etc...

Dont know what version of Windows mobile this is? can you tell by my current setting displayed above? i think im currently running windows mobile 5 and want 6? this device can support version 6, right?

lastly, MUST I upgrade to a newer rom? I dont care really except, I want the GPS to work, and I know even when i had the HTC touch I needed a rom update to unlock the GPS, etc... so Im assuming same with this older device. ?

please help.

lastly how can I install this newer rom without using the USB /active sync? because the USB connector on my device is IFFY slight movement can interrupt its connection......

I do have a 2gb mini SD card with the device...

thanks so much !! anxiously waiting expert replies