Jas0nuk has released a new prxdecrypter for 3.30 FW support. Heres what he posted:
"If anyone wants it, here is an updated PRX decrypter which supports 3.30 PRXes, whether they are signchecked or not, GZIPed, and even RLZed. Should be useful for OE modders when 3.30 OE is eventually released,"