So it came the problem of updating system files in VmwAROS. I had different ways to go.
The first, was packaging new programs and files, and redistribute them. From my humble point of view, this is like reinventing the wheel. Aros.org gives us a new build every day: why the hell should I get files from there, packgae and redistribute them, when Aros.org already does the main part of the work?
So I went for the second. I'm creating a nice script (and I hope I will succeed in) that will do the dirty work for you: you just need to place a new nightly ISO on VMware virtual CD-ROM, and launch it. It will copy the necessary files, avoiding to overwrite dangerous ones and user preferences, to the right paths. If everything will go in the right direction, this should be one of the features of the next release of VmwAROS.