Installing MAP 6.5 with an existing instance of SQL

Hi,

I have read on various websites and forums that  MAP 6.5 can be installed against an exisiting installation of SQL as long as there is an instance named MAPS.  However when running the actual MAPS install there is no option to choose an existing SQL Instance.  There is a SQL Server express screen with tow options.

The two options are (1) Download and Install.   (2) Install from previously downloaded installation files.

So where do you select an existing instance of SQL during the MAPS install?

Thanks

Jason