We'll have to agree to disagree. I found this thread because I was searching the forums trying to figure out what "Save and display medium and large images? Y/N" means.
And I can't see any mechanism for restricting viewing of the original (or large) while allowing viewing of the medium... or am I going senile?
As for keeping originals, yes it would be heavy on disk space, but if you want to automate the sale of digital images through photopost (which I think many would like to do) then you want the original to be on the server for downloading.
To elaborate, what I would like to do (and I think this would be a common scenario) is upload full res photos to photopost, have it resize to a reasonable medium (say 600), and keep the orginal on the server. Then allow users to view the medium but NOT the full res. If they want the full res they pay the dollars.
Watermarking is not much use for this as a reasonable size watermark on a 600 becomes virtually useless on a full res. You can create various watermarks and put some simple if statements in watermark.php I 'spose.
I can hack all this in myself reasonably easily, and use paypal's IPN to allow a user access to the full res after paying, but photopost would be better setup this way anyway IMHO.
Sorry for the digression and thread hijack.