[OS X TeX] bibtex8 TeXShop engine

[Alex Hamann]

Hi,
I am trying to set up a bibtex8-operating engine for TeXShop.

this is as far as I got

#!/bin/tcsh
set path= ($path /usr/texbin /usr/local/bin)
bibtex8 --wolfgang "$1"

but obviously the above code will run the command on the .tex file  
not on .aux. Could anybody how to obtain the desired result?
Many TIA,

Alex