Simply: How do I do it?

Maybe I'm too much of a noob. I'd love to add foobar support for this skin, so I've got a copy of the winamp ipc emulator here: http://163.13.128.179/?project=foo_winamp_ipc&version=0.1.3

I got a copy of supercolossal's beautiful clock here: http://customize.org/rainmeter/skins/61892

It natively has winamp support, so I'm trying to give it foobar support instead by replacing the windowsmediaplugin statements with directions to the winamp ipc plugin.

No luck, obviously. Suggestions?

This looks like a largely outdated skin using the Windows Messages to access WinAMP.
I suggest you try and change it to use the much more versatile NowPlaying plugin