I use the URL vB tags in my sig...
like so: [ url = http://somesite.com/somepage.html]my preferred text[ / url ]
(remove the spaces within the tags, and replace the obvious url and 'my preferred text' parts)
In your case you would add
Code:
The Space Elevator is coming keep looking up or [ url = http://http://www.isr.us/SEHome.asp ] HERE [ /url ].
(again, remove the spaces)
In your signature textbox within your User Control Panel.
And it should look like:
The Space Elevator is coming keep looking up or
HERE