Oliver, my reply was to Bob.
I did see your suggestion for a desktop editor to create 41 applications in your original thread. This is no small undertaking and there are already a multitude of utilities available for developers to test and create 41 applications on their desktops. Take a look through the Development Tools and Software section here: http://www.hp41.org/Contents.cfm
I think maybe you're misunderstanding the crux of what Bob and I are discussing. A fully loaded DM41x can contain in excess of 500 individual operations/routines. UX utilities such as XEQ+ or the excellent customisation's of the Catalogue system included with the AMC/OSX module help a user to a.) execute those operations/routines without having to type them out and b.) unless you possess a photographic memory, it's difficult to remember the specific spellings of those routines/operations you don't use on a regular basis, so a cascaded menu navigation scheme helps you discover and execute those operations at time of need.
The mass key assignment launchers that Ángel includes with many of his modules are a great help too, but they require bespoke overlays if they're to function at their best. Plus there's only 35 or so keys available for user key assignment and that's nowhere near enough for overlay driven interaction with 500+ available commands.
These helpers do of course aid when programming but it's a secondary benefit.