In the first try it out when I try to set the Data Source to the exported XSD of tblCustomers I get a "The XML Schema is not valid according to the XML 1.0 specification." from the show details section of the error dialogue?

Figured it out.

My XSD was ecported from Access 2002 as I don't have 2003 so the XMLNS was xmlns:xsd="http://www.w3.org/2000/10/XMLSchema

After googling I changed it to xmlns:xsd="http://www.w3.org/2001/XMLSchema which I presume is the XSD export format for Access 2003.