Re: Vuser script type for MS-Access SQL statement.
Using the Virtual User Generator, record an ODBC script. All of the appropriate statements for session management and transmission and receipt of data should be recorded on your behalf.
ODBC recording, parameterization and correlation is the method covered in the LoadRunner database class offered by Mercury. You should be able to refer to your class manuals or the online loadrunner tutorial materials to brush up on parameterization and correlation with the ODBC virtual user.