Hey serendibb,
I have installed the aftermarket sports pedals from supercheap auto (monza set i think?) but I had a problem with the heel and toe attachment that it had as the pedals are pretty close and it would tend to heel and toe....i also had a bit of a problem with the provided screws as they were Allen key sets and the heads ended up bolted really quickly but I just changed them all to standard phillips...another problem was the pedal slipping off the clutch as it didn't fit properly but after some wiggling and jiggling it stayed. And the final problem was that since the aftermarket pedals aren't custom made for each car, they have a bar that fits across the back. This bar has a loop (hard to explain) and this had once caught on my floor mats and the car was in constant acceleration and I had to turn off the car to release the pedal. I soon changed the floormats to more fitting ones..
Other than these problems, I have loved my aftermarket pedals and if you want any pics or what not, give me a shout. =D Was a cheap mod for only about $30 AU