GRAC 10 - Data Source for the MSMP Workflow Approver Agents

Good Day Everyone,

We currently have a GRC 5.3 system installed and configured the data source for the J2EE engine to make use of the users in our ERP system.
This works well as all users/approvers are automatically available in both systems. This eliminates the maintenance/administration of users in two separate systems.

We are in the process of migrating to GRAC 2010 on a NW 7.31 standalone system.

My question is:

1. How can we authenticate the approvers (i.e Line Managers) using the user masters in the ERP backend system? Basically I want to replicate what I currently have.

Your advise on this would be greatly appreciated.

Michael