PPCGeeks - metro pcs prl

sorry is this has been posted and answered before i did a search and couldnt find anything.

i have a samsung omnia i910 with the cc20 rom but i wanted to upgrade to the cf03 rom as my phone freezes alot and its getting really irritating. i read specifically that you have to flash with the official cf03 rom from verizon before you flash with a cooked rom, the only problem is that verizons rom will overwrite my current prl file and i wont be able to use my phone.

my ? is is their a way i can backup my prl so that i can have full service after cf03 update with working internet and mms as i do have them working right now.

any help is greatly appreciated thanks again.