Hi,
I've installed version 0.6 of the e-commerce-module together with payments.
First there ist no relation between example product group and products on the website but I already saw a fix in this thread.
The bigger problem is, that if I want to save an order, I get the message:

[User Error] Couldn't run query: INSERT INTO `Payment` SET Created = NOW() Field 'Amount' doesn't have a default value

The method stack looks as follows:

    * Couldn't run query: INSERT INTO `Payment` SET Created = NOW() Field 'Amount' doesn't have a default value
      Line 401 of MySQLDatabase.php
    * MySQLDatabase->databaseError(Couldn't run query: INSERT INTO `Payment` SET Created = NOW() | Field 'Amount' doesn't have a default value,256)
      Line 102 of MySQLDatabase.php
    * MySQLDatabase->query(INSERT INTO `Payment` SET Created = NOW(),256)
      Line 120 of DB.php
    * DB::query(INSERT INTO `Payment` SET Created = NOW())
      Line 836 of DataObject.php
    * DataObject->write()
      Line 187 of OrderForm.php
    * OrderForm->processOrder(Array,OrderForm,HTTPRequest)
      Line 246 of Form.php
    * Form->httpSubmission(HTTPRequest)
      Line 129 of RequestHandler.php
    * RequestHandler->handleRequest(HTTPRequest)
      Line 143 of RequestHandler.php
    * RequestHandler->handleRequest(HTTPRequest)
      Line 119 of Controller.php
    * Controller->handleRequest(HTTPRequest)
      Line 29 of ModelAsController.php
    * ModelAsController->handleRequest(HTTPRequest)
      Line 277 of Director.php
    * Director::handleRequest(HTTPRequest,Session)
      Line 121 of Director.php
    * Director::direct(/checkout/OrderForm)
      Line 118 of main.php

If I debug and print out the object in OrderForm there is an amount value...
my _config.php looks like:

Order::set_modifiers(array(
'SimpleShippingModifier'
));

SimpleShippingModifier::set_default_charge(6);
Order::set_email('test@gmx.net');
Payment::set_site_currency('NZD');

Does anybody know, what's the reason for that? If I look in the DB the 'Amount' value is mandatory.
Thank you,
Roelfsche