Photogallery Software

I need a photogallery software with a few features: - categories as thumbnails (I have to select which photo should represent the category) - thumbnailpage with 3 by 5 thumbnails with link to detailpage - detailpage with link to put it into basket - all photographs have the same price (this should be modify by the admin) - a categorypath link on top of the page but under the page banner - basket for shopping - payment made with paypal - after payment, the paid photographs should be downloadable - in the basket and before payment is done, there should a option to collect all photographs for order of a printed photoalbum without the option for downloading but with paying with paypal. The album should have a basic price for a base set of 10 photos, each extra photo shall cost extra (this shall be modified by the admin) [this can be shown at another place then in the basket - give me your idea] admin area - I have to upload those thumbnails (they do not have be created by the server, I can do this by myself, but a small thumbnail for the listview and a bigger thumbnail for the detailview have to reside in one folder [small thumbnails should have a gallery_ before the name]) - categories follow a folder structure in one special place on the webserver (maybe a gallery folder is the toplevel where the category structure resides) - a detailpage for each photo, where I can write the caption in (title and description) - a email from each order to the admin Maybe I forgot something, but now I don't know what.