How to associate products to each other in a econfigurator session

Hi guys,

I have this product modelling requirement that I'm struggling with.

Our client sells Cable TV product and services.

to make it easier to understand it, I'll present it as a process:

The agent captures the set top boxes (STB) the customer wants, say:
one STB with PVR (STB 1)
two STB (no PVR)(STB 2 and STB 3)

Agent will always enter the STB one by one (that's 3 lines)

step 2 the agent captures the services the customer wants, say:
Sport package
Film package
Kids package

Step 3 the agent associates the STB's with the Services:

Sport package will be active on STB1