Mike, this easily misinterpreted snippet is in the VFP9 Help:

>>When you use the DO command to start a procedure in an executable version or in an application, Visual FoxPro searches only the main program of the executable version or application for the specified procedure.

If you have multiple possible procs you need to run in a separate exe, either you can load them all into the main program (since the upper .prg size limit is gone) or you can create a loader proc in the main.prg that calls the proper proc. I've seen this done by passing the procedure name as a parameter to be executed by ¯o substitution or EVAL() but IMHO that creates a security risk since theoretically a hacker could run unexpected procs via that means... but it should be OK if the loader checks an environment variable or expects a parameter so you can ensure that calls are from your own work. An extra encrypted string parameter including datetime() isn't a bad option.