joomla and ~myusername in URLs

[#1]

I have installed Joomla on my cgi space on PlusNet
it's kind of working, here:
www.ratb.org.uk
but whenever I click a link on the joomla template that I have up there, it puts ~myusername  in the url
I have seen an old discussion about this here:
http://community.plus.net/forum/index.php/topic,84473.html
but can anyone clarify if there is a away around this problem? We really don't want our username to appear in our URLs. What if we want to sen someone a link to a specific part of our site? e.g. ratb.org.uk/events? We don;t want to have to include our username in the link we give out

[#2]

I don't know about Joomla, but Wordpress has a setting for the name of the site, which it uses for all the links. It would be worth looking for a similar setting in Joomla.

[#3]

To eliminate /~username from Joomla site URLs a change needs to be made to the $live_site setting in the configuration.php file. This can't be changed via Global Configuration, it has to be done using a text editor. Change the line
var $live_site = '';
to
var $live_site = 'http://your.site.co.uk';
or
var $live_site = 'http://your.site.co.uk/joomla';
if Joomla is installed in a subdirectory (i.e. /joomla here).
Then replace the file on the server.