I posted my experience (or the few bits of it) with the falken st115. Also, price wise, this is the price that I got when I changed my yokohama ad07 15" to my falken st115 14".
heres the how to on the ones me and my cuzn did...
we did these on his Almera Gti but this can be done any lights..
Gave it try was realtively easy to be fair
It took about 15min to do the fog lights...