I did it myself. Do you have experience working on cars? This one can be tough.
here is the diy http://www.a4mods.com/index.php?page.../fuelpump.html
Couple of pointers, when twisting the pump to remove it the hammer method did not work for me. I wrestled with it for a while then used the handles of channel locks placed in the pump to twist it and it worked perfectly. Secondly, when putting the pump back in it can only go one way and it should drop right in.