TP2 on MetroPCS and unlocked sim

[PillDrive]

I got a used TP2 and flashed it to metroPCS and have everything working (internet, mms)....has anyone unlocked the sim with that configuration? The reason im asking is ...when i first got the TP2 i put energy rom on it and unlocked the sim...next day i went to get it houdinied and it failed...i had to put sprint radio and default rom back for it to work....now that eveything works i want to try to unlock the sim again but im afraid its gonna screw up....also i tried to tether on metroPCS and i cant get that to work either....tried ics and pdanet...any info on the first part and help on the second part would be appreciated.