will start with Part C:
got the cheapest keyboard i could get with PS/2 connector (why waste one USB port?) and will do something similar to the keyboard hack
pick up one of the 2 contact sheet and number the 'buttons' according to which pin it's connected to
pick up the other sheet, and add A-H to the 'buttons' accoring to the rest of the pins.
now put them on top of the keyboard and you have a nice reference guide of which pin combination is what
F3 = B+3
2 = H + 2
now after you write down the table of what is what, you can trhow those sheets in the garbage. all we will use from that cheap junk is this little board:
also, notice how extra cheap that Rosewill brand is, not even a full membrane. It scares me that this junk brand is the most sold PSU at newegg... and they also sell silverware! Also bonus points for wasting epoxy to hide your PS/2 keyboard trade secret.
Now I will have to solder those buttons to that board somehow... will probably do all the rat-nest wiring for the matrix on the buttons and after that is done will solder, or even hold the wires in contact with pressure as it was originally.