Promotion Groups

Hi,

Trying to do below setup using 'Promotion Groups' functionality..

I have two root Products  as below:

                                     1)   PROD A

                                                child A1

                                                child A2

                                      2) PROD B

                                                child B1

                                                child B2

And one simple Product   'MOBILE PLAN'

Now, i should create one Promotion group: MY OFFER   with  min 1 PROD A and Min 1 PROD B. 

 And inside PROD A=> only Child A1 is eligible. ChildA2 is not eligible PG.

 And inside PROD B=> only Child B1 is eligible. ChildB2 is not eligible for PG.

with Child A1=> MOBILE PLAN should be with x discount

with child B1+> MOBILE PLAN should be with Y discount.