Smoking Xmod!!! 4562 fets?

[chc]

My xmod started smoking, and i shut it off. After a few hours, i turned it back on, and it could only go in reverse and steer. It seems to me the forward fet is fried. After disassembling the car, i found burn marks around the fet closest to the rear of the car, under the circuit board.

My question is,is it possible to switch the two fet's so that i can still use my good reverse fet to go forwards? Each fet says A1792, but the (well, at least what i think) forward fet says 332 and the reverse one says 341. Not sure if it would work. Also, if i do upgrade the fet's to 4562 fets, and i choose to stack two of them, can i only do this for the forward fets? i rarely use reverse, just to back up from obstacles, so the current going in reverse will be much smaller. basically, can i choose to only replace the fried forward fet with an upgraded (or two) 4562 fet?

If it matters, i am running six cells. Any help would be appreciated.