v551 categories and ring tones

I'm looking for a way to assign a specific ring tone to a group of entries in my v551 phone book. Does anyone know if there is a way to do this? I initialy thought that you the Catagories function would enable this but so far the only I can find for Catagories is to filter the phone book view.

thx

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The only way I know to do this is to move all those entries from your sim to your phone and add the ringtone for each.