If I wanted to link to www.knittinghelp.com , this is what I'd do:
www.knittinghelp.com ]Knitting Help
You would have to omit the spaces that I put in, which are there just so you can see what is actually typed in in order to get the link to post. And in between the [url=] _________ you just type in whatever words you actually want to show up in your post. So in my example above I typed in 'Knitting Help' in that space.
Does that help??