[quote="Jasiek":145wg6p5]If you just want to add/edit groups for contacts and companies then go to admin panel and edit Common Data. Please note, that Companies groups are separate from Contacts groups by default (this can be changed by editing properties of the group field).
If you want to create a "container" where you can store companies and contacts - there is a special module for it called List Manager:
http://epe.si/list-manager[/quote:145wg6p5]
Thanks!!