sbillard. thanks for replying, but that doesn't work. "uebersicht" is not an album. I think I should explain further: This is a very modified zenphoto install (the text pages are administrated by website baker). It uses not the normal index/album/image.php-order. In fact I skipp album.php and use an additional modified index.php named uebersicht.php ("uebersicht" means overview and "rubrik" means category in german). This is called by the zp standard term for pages "p=uebersicht". It doesn't use any subalbums and I had to write a new function for that, but zenphoto is really cool, it works! The best would be you take a look to see what I mean.
The site already for testing online: www.renateemme.de (look under the link "Bilder für große Leute" (means "images for grown people"), there are a few unrelated test images)
It works without mod_rewrite perfectly, but would be nicer with of course...