OK Cid.
Right under Big Blue Huddle, on the top of the page, you see a bunch of buttons.
Click on the profile button
On the left side of the new page, you will see a few boxes with other things in them
Under Modify Profile, click on the Forum Profile/Info.
A new page comes up where you can choice something to use as your avitor. If you are uploading a picture from the net, click on 'I will upload my own picture', use the browse button to find your picture, and the rest is history. If you already have your picture, use the 'I have my own picture' button and put the site where your picture is.
You can also add a few words where it says 'personal text'.
I'm pretty sure you can only use a very small picture as your avator, so make it good. If you have any further questions, talk to Rich.