What I've done is use that All-in-One file, and incorporated a version of Stephane's muO work, so there's now a prototype muO All-in-One file available at http://www.filebanker.com/muo-all-in-one (random hosting service). This took half an hour for me to do, so we've now got a nice basis for any developer to quickly package up their work for wide distribution.
That's a nice try, but it is not finished: muO needs auxilliary files (that's mostly documentation).
My own "ready-to-use" distribution for Windows (at http://www.zogotounga.net/comp/squeak/muo/muO%20235%20image.zip, which I guess you worked upon) includes two folders ("muO books" and "rawwaves") that should be located in the same directory as the image; that would be in the Resources directory of your archive.
Then there is the problem that a saved image is not easily available: the All-in-one executable always launches the initial image. In the case of muO, this is a show stopper, since it is a development environment, not an application supposed to always start from scratch.
Stef