[WestcoastST]

I did it myself using a step stool and two small c clamps. Raise the car up on jack stands. Place some masking tape on the splitter in the approximate area where the 4 holes get drilled. Place the c clamps on the ends of the splitter, and lightly clamp. Take a tool with a very sharp point. I used a metal soldering tool, an awl or a needle attached to a stick would also work. Insert the sharp pointed tool into the 4 clips where you need to transfer the clip location, and push hard to make a mark on the masking tape. Drill the 4 holes you need to drill, on the splitter, and then remove the masking tape. Cover up because fiberglass itches!!!!

I cover my one-man install in my build thread on the other website.

http://www.fiestast.net/forum/threads/2353-WestcoaST-Performance-blue-build/page7