So, you can also use PostWrap as you said !!
On the Block Link in ADM Menu, you put the Fig. dir, and in Line Bellow you put the PostWrap Link.
Then when users clicks the Image, they get a module eith 4images into PHP Nuke.
Lets say: You can use a menu into main 4images page, with the PHP NUKEīs modules also !!
Mike