I'm not quite sure on all the details of relieving the fuel pressure, but I think I seen it on this site somewhere. That or it was in my Haynes manual.
Even after relieving the fuel pressure, you'll still need to have a rag handy for any fuel remaining in the lines.
Update: I just read in my Haynes manual that to relieve fuel pressure just disconnect power from the fuel pump and run the car until she stalls from lack of fuel.
The fuel pump is under your rear seat which are only held in with a couple of bolts.
PeDDyMN