prl question

[zeurx]

Next year i will be going to college in a town that has rev a with verizon and sprint but not alltel. Thankfully alltel has agreements with both networks for full data and voice (correct me if im wrong). My question is has anyone ever flashed a prl from another network on their phone to make the phone latch on to one network or the other? and if so what prl should i use, is verizon better than sprint, with the nation wide roaming from alltel which verizon per should i use (I or II) and so on or is this the worst thing that i could ever do and have alltel crapping bricks out if the catch me doing this?

Thanks in advance