Help please <xml/nusoap...cart details, user info, merhant and shipping info>

[hazer]

Hi to all,

I am making new payment modul that just have to send cart details, curent user info, shipping details and merchant info to soap web service parsed as XML string.
I have made the connection string and send test xml from my custom presta modul, but i am new with presta so i do not know how to get cart details, curent user info, shipping details and merchant info from the shop.

Please HELP!