Hello Owen, to become root act like described in http://talk.maemo.org/showthread.php?t=33911. This means after you installed rootsh you have to type "sudo su" to become root in xterm.
The wget-command should be pre-installed.
For further questions I recommend you to use the mailing-list maemo-users@maemo.org because this is the proper place to handle this kind of problems.

With the fix of Michael everything is fine. wget seems not to be preinstalled however. I just downloaded the file with the browser.
Thanks for the work!