I've found a tomtom POI with Burger King listed. but when I use the online converter and try to it put on my navman F20 I get a message saying " Unkown File Format" I've used the converter before and it worked great but not for the Burger King list. ??
The most likly problem is that your source file has "Unkown File Format".
You can use Navman or Garmin CSV files, regular TomTom OV2 files and encripted OV2 files.
POI Edit (online) also accepts Garmin GPI files.