Hey Rusty,
how about: After the Install-Process such a "Beginner's Menu" does exist - but when the user opens BiaB for the first time he gets a Popup-Window which informs him that and how he can get rid of that menu if he wishes so. And if he does so and in case that there are any "slim versions" of the regular tools in the Beginner's Menu, those then get integrated into the regular "Song Tools" Menu (since they might still be useful, e.g. for a "quick-song-creation-process").
In regard to the Custom-item: I didn't know about that - thanks for letting me know!