I'm loving my new laptop, having a good time with Fedora Core 2 on it, but I'm having some big issues with it too.

This particular issue is installing a program called gPHPEdit. The screenshots look pretty good and I'm excited about some of the features it claims, but I can't get the dang thing to work. When I run the ./configure command it goes through a whole list of things that are all labeled as "good" or "yes" but then it comes to this:
The previous line checked for pkgconfig and found it in usr/bin/. I didn't put it there, so I'm assuming it's standard Fedora. In the usr/bin/ directory I have gtkam, gtk-demo and gtk-query-immodules-2.0. Apparently that's not what it's looking for.

So I went and downloaded GTK and the other dependent libraries - gtk-lib, atk and pangora. Trying to ./configure the gtk package said I needed gtk-lib first. I was able to ./configure, make and make install the gtk-lib without problem, but then none of the other packages could find it. That made me go looking. In usr/lib I now have a few differnet gtk folders - gtk-2.0 is one of them, and it seems that's what gphpedit was looking for. I didn't put it there, and from my reading online I think it's a default under Fedora 2. So...it's there. How do I tell the gphpedit installation script that it's there? The error message mentioned adding it to the PKG_CONFIG_PATH environment variable, but I have no clue how to do that. Should there be a gtk file in usr/bin?

Please excuse the newbishness of this question, but does it make a difference where I locate the .tar.gz file when I download and unpack it? I've been just putting them in my home directory, since that's where the web browser defaults to putting downloaded files. It's occurred to me that perhaps that's not the place to put things, but none of the install directions I've read have told me to do otherwise.

Any help is much appreciated!