HTTP to RFC scenario

I have been trying to configure the XML to IDOC scenario given in the XI starter pack . Does anybody have the sample XML and XSD files mentioned in the scenario ?

There are two messages in the XSD, purchase order request and purchase order response. It would be a great help if anybody could supply me these XSD and also the XML test documents involved in the workshop scenaro.

Also could someone inform me what tool i can use to create custom XSD ?

Thanks,

Joe