I wouldnt bother with those shitty controllers. The official controllers are probably the safest way to go, although there is this controller that works for the Genesis/SNES, and has rapid-fire. It's transparent and a pretty useful controller for that danmed soup-drinking contest in Chrono Trigger.
__________________
"Ignoring all the retarded anime shit and Guitar Woman fawning over a drawing to say that Toobin' is the best Tube similation since Virtual Bart."- Gadzooks mockery.com/halloween/bag/costumequiz/default.php