FTP access would be useful, thanks. Then perhaps other interested Nekochanners could download it, if you have bandwidth?
I had a spare hour this evening and found I allready had the main components on this laptop, so put togther a stripped down installation (no printing, not many fonts, but OpenVector, OpenGrid, Pipedream4 and Fireworkz to try out) which zips to 8MB.
This includes two Linux binaries, two Win32 EXE files (one each for dynamic recompiler and interpreter versions) and the allegro42 DLL for Win32 - but you will need the allegro package installed in Ubuntu. The Linux binaries were compiled for a Puppy distribution, so are likely to be configured for wide compatibility rather than optimal performance.
Once unzipped, you'll have a directory "RPCemu" containing "rpcemu", which should be made executable and executed. The config files and RISC OS itself all sit within the RPCemu directory, so no paths to set. If it does not work, there is source code at http://www.marutan.net/rpcemu/#downloads
which I found to compile without problem once I had the dependencies/tools set up, and info at http://www.marutan.net/rpcemu/linuxcompile.html
- just be careful not to overwrite the config files!
Once running, it's configured for StrongARM CPU, 128MB RAM and a 1280x720 screen, which fits nicely in my 1366x768 laptop screen, but there is a good choice of screen modes available in the "generic" monitor definition file. I have not set up networking, as it needs some host components and bridging, but the driver you need "EtherRPC" is in the right place in system resources. Instructions at http://www.marutan.net/rpcemu/manual/network.html
though success with version 5.1x of the OS seems patchy.
We really should move this discussion to the "Misc OS" section!