Where to Put Plug-in...

[evenmonkeys]

I'm not asking for help with the php. I'm asking where to put the plugin. "Add New Plug-in" Then the drop-down list gives a million locations. I want to put it directly after the logo. I want to keep the normal navbar.

This is what I am doing...
I have the main website with a navigation bar directly under the banner. I would like to put the very same navigation bar below the very same banner on my forums. I also want the regular navigation bar that comes with the forums to remain where it is. The reason I am doing this is because I do not want to edit two different navbars whenever I change something. I'd rather they both come from the same source.

Thus, I am trying to do it via plug-ins.