These are the steps in post your pic in the avatar:
1. Go to your profile (upper part of the site)
2. Choose the avatar
3. Upload your pic (note: your real pic must be on ur account)
4. Enjoy!
Posting a Signature:
1. Look for your own signature
2. Save it on your folder
3. Go to your profile (upper part of the site)
4. Choose the Signature
5. On the blank, click the picture icon in the applications
6. Put the URL of your photo (you must host it first) (ex: www.imageshack.us)
7. Enjoy!