Mark, if I understand what you're after, it sounds you should take a look at Stephan B. Wessels' "Squeak Development Example for Squeak 3.9" tutorial (URL below)

http://squeak.preeminent.org/tut2007/html/

In particular, Section 6 details creating a stand alone, double-clickable application (or as close as Squeak can get, depending on OS) which won't expose the user to the Squeak development environment. The previous five sections describe developing the application used in section 6.

I believe the mechanism also works in Squeak 3.10, but don't know from personal experience, nor do I know if there's any better way.

Hope this helps.