Just a thought, but if you click "Help" on the main menu of Web Matrix there is a built-in link to www.asp.net Web Matrix Development Tool Forum. I would think they would be glad to help you. Haven’t used Web Matrix much myself, but think that it would not be any harder than Visual Studio .NET, which only takes a click or so. Hope this is of some help to.
Have a nice day,
Danny Wentzell