Is it possible to change the names of the webpages_Membership tables, roles, etc. From a simple web matrix template?

I created the Web Matrix website from a starter template that creates a database with several tables for login details. Most of them are the names webpages_Membership, webpages_Roles, etc. The hosting company that I use gives only one database, and I want to have more than one site on the server. I want a table name prefix to make it unique, but it looks like the web matrix structure will only work with the name of the given table. Does anyone know if this is possible?