To compile and install, simply:
make
make install

If you need to change the install paths, see the Makefiles.

To enable the plug-in you then have to open the preferences dialog in xmms
and select "enable" in the "Effects/General Plugin" tab.

Then run it by typing xmmsfind_remote at the prompt or assign a keyboard shortcut
from the window manager to it:

On Gnome/Sawfish (default on rh 7.x):
Open "GNOME Control Center" (gnomecc) and select "Sawfish window manager" and
then shortcuts. 
Then in the "Add new shortcut" box, select "run shell command" and enter
xmmsfind_remote in the "command" box. Assign the shortcut of your choice and off you
go!

KDE should have a similar way to configure shortcuts.

See the manuals for other window managers for details regarding them...
