As the CF62 appears to have MIDI ringtone support, the solution is relatively simple.
Go to www.summerston.net and enter 'Seinfeld' into the 'quick search' box in the top right corner of the page. It'll return one result, so click on that and then use the 'Click here for your free Wapcode' bit. Now you just follow their instructions and it should work.
Hope this helps