Thanks guys, I appreciate it.
Believe it or not, this is easy stuff... to me this is a vacation from mkke modding.
So I found the input bit.... If I send the input status via manipulating this bit instead of simulated keypresses, the alt key is now usable.
It has issues with me sending the start/coin up buttons but that shouldn't matter because they are non gameplay keys so I can just use the old method.
This is what I was waiting on before I added joystick support... it is far easier to do it this way.
Oh I ran into an issue and I was wondering.... do any of you guys have issues getting Felix to jump to the left or right? I thought it was my code, but I played the original and the issue persists... unless you hit left/right and jump at the perfect time, he just jumps in place. I'm currently testing with my keyboard, so that may be the issue, but I was wondering if this was a bug in the game's code or a hardware issue.