I did the following:
Installed roho_mini.exe and then copied the c:\Program files\rohos folder to a non privileged account in another computer.
I tried to run "agent.exe" and "rohos mini.exe" but did not work because require administrative privileges.
Then I ran RBrowser.exe and created a 600MB volume. When copying firefox portable to the volume received the message (files couldn´t be copied):
http://i49.tinypic.com/v4wi6g.png
Then I tried to run the firefox portable and said:
Mozilla Firefox, Portable Edition couldn't be started. Try to reinstall to fix this problem (ERROR: firefox.exe not found). Obviously, such file exists.
I don't know how to create a volume and run portable applications from there on unprivileged computers...