Does the application have to be on the same server that the gallery is on. Can you hook me up with some documentation if the answer is no.
Not sure if it will work across different servers, never tried, but I can say it's definitely not recommended. For a start, Coppermine and your other app need to share the same database.
http://documentation.coppermine-gallery.net/en/bridging.htm
From the docs
QuoteThis might work:
Bridge app: http://board.yourdomain.com/
Coppermine: http://gallery.yourdomain.com/