I'm just wondering if it's possible to change the system captch to another one which will earn money for the site.  As we share our revenue with our members, I obviously want to monetise as much of the site as I can.

The one I want to use is Solvemedia - their instructions for integration with php is at http://portal.solvemedia.com/portal/help/pub/php/ but if someone could take a look and tell me where to do this using Oxwall then I would be extremely grateful.

Many thanks