Question Q: Flashing Verizon Samsung Stratosphere i415

I have the latest Verizon Stratosphere i415 with jellybean 4.1.2

I can root it and everything else but i want to know how i can flash it to use with Metro PCS instead of any other carriers,
I have been looking online for a couple weeks now and everything is for 4.0 or something else..

So what do i need to do to flash it for MetroPCS it is capable of FULL flashing i know that much..

specs are:

OS: Jellybean 4.1.2
Storage: Internal 8Gig External Upto 32G
Memory: 1g
Processor: Dual Core 1.2ghz