1. Make a copy of this file from my site - http://www.mobile-seo.co.uk/sphinn.xml - and upload it to your own server. No changes required.
2. Login to your FeedBurner account, navigate to one of your feeds and hit the Optimize tab. Click on FeedFlare (under SERVICES - left hand menu) and scroll down to the Add New Flare option.
Enter the following URL (obviously changing yourpath to the location of your own file) - http://yourpath/sphinn.xml?version=1
*** You must retain the version variable for your new FeedFlare to validate ***