Symbian and automatic group ringtone installation

Question

Mobile development

There are Nokia E51 and E50. All contacts are scattered across several groups. Each group has its own ringtone (that is, in fact).
When creating a new contact, in the "Company" field, I specify the name of the group in which this contact will be located. Then, with the help of the Group Creator software, the contacts are divided into groups.
Actually I'm looking for software in which it would be possible to specify certain ringtones for each of the groups, and then with one click these ringtones can be assigned to all groups. For sometimes contacts need to be added quickly, and it is forgotten in which groups new contacts appeared and which ringtones should be reassigned.