One can also do it with armory instead of strongcoin-offlinetx-script, but firefox+strongcoin-offlinetx-script seem simpler to install onto an offline machine than armory (took me multiple sessions of 1-2 hours to get armory onto the offline ubuntu machine).
Molecular,
What was the cause of the problem here? If you use the supplied "offline-bundle", it takes about 30 seconds to install on an offline Ubuntu machine (double-click InstallAllDeps.sh, and you're done). If something wasn't so easy, then I'd like to know how it can be improved. I expected the offline machine to be the easiest...