The commandwould launch the install file from the rootsh page in the downloads section of this site if it managed to start the internet connection. This would then launch the App manager to install the program. However at this point screen touches are required to confirm the installation.

Try it anyway. If you do manage to get the internet up then you might be able to get x11vnc up and running. I managed to get it up and running without installing it by downloading from here and then using dpkg to extract the contents:
Then I browsed the extracted directories (x11vnc/usr/bin) and and ran ./x11vnc.

Unfortunately I haven't had enough time to get it working properly - while x11vnc does run, I couldn't access it from the PC. It's been a while since I tried it on the n900, when I get a chance I'll look further.

Searching google for 'how to install apps without root access' brings up some results which talk about adding paths to your profile. That might be what is stopping it from working, or I might just not be running x11vnc with the right parameters.

Of course that is all useless if you cannot get an internet connection.

BTW Just a little hint for using xterm when typing commands, filenames and directories: typing the first few letters and then pressing Ctrl and i will autocomplete the name or press twice for a list of options. eg from the MyDocs directory typing cd .doc and pressing Ctrl i will complete it to .documents.