If you don't know it's best to ask, better than mucking up a system BIOS if you get it wrong! Anyway, all you need to do is rename the the modded BIOS to M622A_13.bin and flash in the normal way. In your case the actual BIOS name just got hidden inside a more descriptive fuller name. Other than that you should find everything else you need to do already posted here.
all those keys are blacklisted im stuck at the reduced functionality again... f**kin bios mods dont work anymore tried striker 1401 and i cant rearm, reactivate whatever:/(