As promised, you can now download the presentations (in german Language!) which were held by me on Mamboday 2005.
Einsteigerworkshop mambo-phpShop (german!) (1.08 MB)
Entwicklerworkshop mambo-phpShop (german!) (235.26 KB)
One is for Beginners and the other one is for Developers and Experts. Even if you don't understand German, you'll find a specification of the Payment Module API and Shipping Module API in the Developer Workshop ("Entwicklerworkshop mambo-phpShop").
