really not sure if this is the place...Follow

you need to sign up to be a premium member on the site.

For avatars:

* Click the "My Account" link in the sidebar.
* Near the bottom, click "Your Files". <-- Note to admins: Shouldn't this link's text be changed to "Your Avatars", as it only allows images to be uploaded here anyway?
* Find the image you want to use as your avatar and upload it. Note the 1024kb and 120x120 limitation.

For signature images:

* Make sure you have at least one character set up correctly. (I see you do already.)
* Click the "Your Characters" link.
* Click, for the appropriate character, "Set up Image Signature".
* Choose options as appropriate. The background and character image are set by the top two links on this page.