is there a way to allow zenphoto upload psd files or maybe a plugin that allows you to upload them?

You can try to modify the class-textobject.php filter plugin which is an example plugin for file formats Zenphoto does not support.
http://www.zenphoto.org/documentation/plugins/_plugins---class-textobject.php.html

But even if you get that going the GDlib that processes the images to create thumbs etc. will not support that (don't know if it is possible, search the net on GDlibary) and of course no browser will be able to display a .psd itself as it is not a valid webformat.

yeah im just wanting them in a folder for people to download.