need help with GIMP install
 

I'm trying to install GIMP 1.2.5 on Mac OSX 10.3.3, I've installed the developer pkgs,
X11, etc. I've walked through the installation of all the other packages like:
TIFF library
PNG library
JPEG library
glib 1.2.10
gtk+ 1.2.10

I'm having trouble with the configure script where it tries to look for gtk-config.
the error message I get says:

checking for GTK - version >= 1.2.8... no
*** Could not run GTK test program, checking why...
*** The test program compiled, but did not run. This usually means
*** that the run-time linker is not finding GTK or finding the wrong
*** version of GTK. If it is not finding GTK, you'll need to set your
*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point
*** to the installed location Also, make sure you have run ldconfig if that
*** is required on your system

I have gtk-config located at:
/opt/local/bin and
/Users/[name]/gtk+-1.2.10

I've tried to use: setenv GTK_CONFIG /opt/local/ and so on with no success
(it seems to be looking for this file in a /bin directory

I seem to be getting close, but, I can't get past this point.
Any suggestions would be great!

Thank you