You already figured out out how to find the ticker website and edit it.
Once you have created the ticker you want, you'll be taken to a screen which has http: addresses for html, psuedo html, ezcode, etc.
You want to select and copy the address for the psuedo html (the second box). Be sure to not close this internet window if you want to create another ticker.
Now, go to your window that has the WDWradio forums open. Click on the quick links drop down menu (near the top right of the page). Click on Edit Signature. Paste the psuedo html you copied in the signature window. You can then go back and create more tickers and copy their psuedo html and paste in your signature page. You can add text, smilies, etc to personalize your signature. I added my cabin number above the cruise ticker. You can preview what your signature looks like. Once you like it, save it, and it will automatically be added to your posts.
Hopefully this will help.