Installing new Gnome apps

[dieder cobweb nl (Roel Diederen)]

Hi all,

Whenever I install a new gnome application (usually from source), the new
app doesn't show up in the menu.
The program gets installed somewhere in /usr/local/share/gnome
instead of /usr/share/gnome where all the default apps are.

How do I get gnome to see also the apps in /usr/local ??

I'm using slackware 7.1

Thanks,
Roel