populating condition type and condition value in service order

Hello Experts,

While creating service order when product is enterd in line item the pop up will display which contains all service contract has been made for that product

my req is

Depending on the product entered and the  contract that has been selected in the pop up, corresponding condition value must be populated in service order item level under the condition tab against ZCD1 condition type.

note: the condition value is maintained in service contract item leve under price aggrement and that will store in the condition table CNCRM.....

for this i have to get Guid of product which is enterd and selected contract in the pop up  by passing these guids in the condition table CNCRM...we can get the  condition value of price agreement (OPAR).

but issue how can get selected contract Guid in the pop up? and tried to implement badi CRM_SERVICE_CONTRACT badi but couldn't get solution.

Can somebody please tell me how can achive this.

expected out put

Regards,

venkat.