Hi! Is it one of those animated fancy images? If so try this out and let me know if it doesn't work.
If the image is on another website, on the preview page of the image you want to add, click in the box with the HTML code.
Copy that code (control + c).
Return to your CafeMom account.
Paste the code (control + v) in the 'Signature Body' box.
When you return to the 'Manage Signatures' page, sometimes you will only see the code that you pasted. Click on the 'Edit Signature' link, save it again and that should do it.
at 2:56 PM on May. 13, 2010