This is applicable for the current version of Plogger (v 2.1 beta) I have created a small mod/script to allow more than one instance of plogger to be installed on the same MYSQL database. It requires a few pages to be overwritten and the creation of a new (extra) cofig page.
Basicaly it means you can enter your own MYSQL table prefix but DOES require a seperate version of the plogger install folder on your webserver for every instance of the gallery.
This would be handy if you run several domains that require a seperate gallery from the same webserver.
I made it because it was something I needed and thought I would share :-) It has not been tested on any other versions. But if it doesn't work on a prior version it would be very simple to adjust...
It can be found here http://crowds.slashdash.co.uk/blog/index.php