I am really confused. I am also new here, so tell me if I am breaking any rules. (I am new to foruming here.) What I need to understand is the GEOM plugins.

I downloaded it, but where do I put it for it to show up in the drop down screen thingy in milkshape?

From the program notes included in the download:

"Installation for all MilkShape plugins consists of unzipping the file and placing it
in the MilkShape program folder. It you used the installation defaults, this will be
"C:\Program Files\MilkShape 3D 1.8.5" or, on Vista 64-bit it will be
"C:\Program Files (x86)\MilkShape 3D 1.8.5".

After placing the plugin in the program directory, close (if you are using MilkShape) and
restart the program. Plugins are searched for only when the program starts up."