real easy. The fpr is located on the fuel rail (looks like a little diaphragm thingy with some hoses coming off of it). Put a rag underneath it, pull off the fuel return line and the vacuum line, and unbolt it (I think there are two 6mm bolts). To install, just bolt the fpr on w/ new o-ring, and hook up the vacuum and fuel return lines. The vacuum line nipple is the one on the top that is bent like an "L", the fuel return is on the bottom.

:edit: lee is wise h: