[Oxymoron238]

I don't know that much about Morthgear since I haven't played around with it that much. But I do know that the TP2's keyboard can do simultaneous key presses.

I suggest you try smartgear, another multiple emulator for the TP2. I tried it out just before posting this to make sure, and I can confirm that you can do simultaneous key presses on it.

Unfortunately, smartgear isn't free (it's 10 bucks), but there is a trial version availabe that will let you play any rom you have for about 1-2 minutes. That way you can see if it works for you.