Sure, when you reply to a post there is some Icons above the text window. The one to format a link is the globe with a little chain link at the bottom. Once you click it it'll ask what text you want displayed for the link. This would be where you put your user name. then it'll ask you for the actual link. If you have scripted windows blocked a yellow bar will pop up at the top of the screen. Click it and temporarily allow scripted windows.That's it pretty much. :) If you want to see what the code looks like just quote this post.

Magicninja