I am creating an automated build of SQL Server which is run from a batch file. Is there any way to change the registry, or other methoid, of deciding which SQL Server version (Either Enterprise or Standard) will be installed, or are the two versions still seperate builds?

If they are seperate builds, I guess I could get around it, by having a "master" batch file call an appropriate "child" batch file, but this would mean having a folder which contains both sets of binaries, which I rather avoid.