This is from an old post....
Signature: Mine is "Kimberly, Cheeko's moma".
go to "My Stuff" and then "Edit profile". Scroll down and put whatever signature you want.
then scroll down:
Avatar: The picture that shows up on the left under a users name.
Open an account with photobucket. Upload the picture at photobucket.com (it's free). Copy image url, then on the forum, go to "My Stuff" and then "Edit profile" and click on the bullet
" URL to your avatar (Your image must be smaller than 300x300 pixels; .gif, .jpg, .png accepted)"
Paste the image url there, and then save.
If you want a picture in your signature page, copy the img url and put it in the signature box.
To post a picture in a thread, just copy and paste the img code from photobucket.
Hope this helps and there are plenty others on here that can give better directions than I can.