Here is the instructions I got, hope it helps
"c&p it by using the "insert image" box-
Right click "copy image location" on my image.
Open your profile and click on "signature"
Click on the "insert image" box on the toolbar.
Paste the image location into the pop-up box and click enter.
Check the image using "preview". If OK click "save".
If not OK play around with the size in the pop up box. Think I used 50 x 50."
"c&p it by using the "insert image" box-
Right click "copy image location" on my image.
Open your profile and click on "signature"
Click on the "insert image" box on the toolbar.
Paste the image location into the pop-up box and click enter.
Check the image using "preview". If OK click "save".
If not OK play around with the size in the pop up box. Think I used 50 x 50."