How to USE AME for Purchase Requisition Approval

[jnandana]

Hi I have one requirement.
My client need second approver by Minance Manager for a requisition which has already been approved by line manager.

My client is using R12.0.5
We are using AME for AP invoice approval, not for PR approval.
How can i use AME for PR Approval? What are the basic setups required to be done, so as i can bring second approver from finance department (always same user) in to approval group?

Any help on this is highly appreciateed

Thanks and Regards

Jithendra