Transistors/diodes general pcb use

sorry to be an electronics noob here, but can someone please reccomend a digikey part # for npn transistors for madcatz trigger hack along with the appropriate resistors and maybe some general use diodes for dual pcb isolation? i’ve searched through the threads for days now and i just can’t find what i need.

http://forums.shoryuken.com/showthread.php?t=187686
http://forums.shoryuken.com/archive/index.php/t-175206.html
http://forums.shoryuken.com/showthread.php?t=175861

thanks a lot. this should do it