I just need Filemerge "only"! Not several GB's of Xcode.

I am teaching myself how to use Dreamweaver and it has come up several times that I have no app to "compare files". It sounds like "Filemerge" is a good one to have from my research. I would like to install it but I don't want to install all of the Xcode tool needlessly. How can I just install Filemerge or as little as possible of Xcode? I have seen other posts online outlining how but it was for older versions where the custom install menu was broken down much more. In my version (10.5.2 disc), the custom packages are not labeled the same. My best guess would be to install only the "Developer Tools Essentials" but that is even 1.4GB and doesn't even list Filemerge in the description below. Obviously this package is overkill and I am not even sure if its the right package anyways.

Please recommend how to install the smallest pkg possible to get Filemerge, or let me know if there is something else that would simply work better for my limited needs. Thanks for any input.