I made a 158-line PHP script to generate a forum signature with my latest Waymeen Sporecast asset. It only needs three lines of configuration (one is optional) and a base image like this one. (A template is included in the .zip.)

Here's how you can use it:

Download the code from http://llamaslayers.net/daily-llama/wp-content/uploads/2009/06/sporesig.zip.

On lines 3 and 4 of sig.php, change the Sporecast ID and (optionally) the font location.
On line 2 of .htaccess, change the /spore/ to the location on your website the files are. For example, if sig.php is accessible at http://example.com/sporesig/sig.php, use RewriteBase /sporesig/

Upload it to your server and go to the sig.php file. You'll get a few error messages, but don't worry. Refresh the page and the error messages will be gone and your signature will be there!

The signature will only update once every 10 minutes to make it faster.

If you need any help, feel free to ask.