You can find the latest PRLs here.
http://www.corolada.com/prl/ ...and you want EvDO w/ Data Triangle:.
Its not hard to update manually Download the PRL(60611) and save it to your SD card.Then from your phone pad dial ##PRL# then enter your MSL#. You will see Update PRL. Hold on that and it will pop up a Edit window. Once your in there you can browse to your SD card and find your new PRL.Choose it and follow the directions from there.
P.S. Your problems have nothing to do with your PRL....I would just re flash a rom of your choice and you should be fine.