Custom ringtone for contact groups?

[BMF136]

I was just trying to figure out a way to assign different contact groups (family, friends, business) each their own group ringtone and don't see a setting for it. The only way I can see doing it is to go into each individual contact and edit them but it's not that important to me!

Do you know if separate ringtones can be assigned to contat groups?

Thanks!