Gallery 1.5 and adding payment modules - help needed

[calmdesign]

Hello,
This is a bit of a long shot, but has anyone here used Gallery 1.5, added the shopping cart module and then customised it to include 3rd party payment gateways???

For those of you who don't know what i'm on about, Gallery is a very good free php photo album app:
http://gallery.menalto.com/

I've installed it for a friend and added the shopping cart module which only caters for Paypal. He would like it to link to Protx now, so I'm seeing what i can do.

I've posted on the Gallery forums, but it no joy so far.

If you can help, then great, if not, then thanks for reading.

Cheers,

Coris.