Parent item group in Resources group structure.

Hello,

I want to set up a Resources group structure that is similiar to the item groups structure, i.e.:

1. Deliveries
1.1 Furniture deliveries
1.2 Office supplies deliveries

2. Service
2.1 On-site service
2.2 In-shop service

See example from item group structure: http://imgur.com/YRgSOmo

Is it possible with Resources in the Resource planning module in Navision 2009?

Any help is much appreciated.