loading bar and upload
 

I'd be interested in buying a version, but would like to know how difficult would it be to implement a loading bar and the uploading to slave servers.

For example say pp is hosted on server a, but the actual images|zips are hosted on a slave server

Would these features be possible?

I cannot think of a way to manage resources PhotoPost using a multi-server setup unless those drives are mounted via NFS or some other method of keeping the disks available to the primary script.