[scribus] Location, location, location

[Yahoo]

    When I click on "edit image" in Scribus, I get a message that tells me 
Gimp isn't available. But Gimp is installed on my computer. Does it have to 
be installed to a particular folder, or is there some other way I have to 
tell Scribus where it is?
     The same is true of my Gimp Help file. I downloaded it and installed 
it, but Gimp can't find it. How do I give it directions?

                                                   -Joe Ward