Matthew Nothing

so heres the idea...i have no interest in using any of the orignal midi stuff from the nintendo. I just want to output staright midi note (on/off) from controller button, and cc data from xyz of the powerglove. what i've found so far is that the controllers work on a 4021 IC, which is an 8-channel parallel to serial convertor. i've also found an example of how to hook a joypad up to a PIC16F628A here-> http://devcast.dcemulation.com/mods/unicont/nes.php heres what im curious about. If i want four inputs (from four seperate controllers ie-powerglove, powerpad, etc), can i hook each one to an input on the DIN model and then run it to the core to get midi...or am i completely out to sea on this one. also, how different is the PIC18F452 from the 16F628A?

I'm trying to strip out a nintendo and replace the innards with a core and a din . I want the input to be taken from 1) a powerglove 2) a powerpad 3) joypad controllers. I want the output to be a simple midi out, on a predefined channel. I'm a complete newbie at all of this and i'd really appreciate it if someone could maybe help walk me through what I need to do inorder to get this working properly. thanks!