R/3 like Master warranty representation in CRM

Hello,

In R/3 system, they have a Master Warranty and service items assigned to the master warranty. A counter is assigned to each service item.

For example:

Master Warranty: MW003

Service item1: Hardware support counter: 6 months

Service item2: Software support counter: 1 year

When I try to represent the same in CRM, I can't assign the counters to service items because in CRM, counters are assigned to warranty, not to individual service items.

Do you know any solution to associate a time-based and usage-based counters to service items in CRM so all related service items can be kept under a single warranty?

Thank you

Benolin.