SUS-MM integration in Classic Scenario for SRM

Hello All,

We are using SAP SRM in classic Scenario.

We also plan to integrate SUS with MM .

Looks like in the Classic Scenario with SRM , only the Direct material procurement is possible

using MM- SUS.

How would the SUS-MM integration work for Indirect PO's.

Our Process is as follows:

1) Shopping cart created in SRM for Indirect material & approved ( with cost assignment)

2) Classic PO created in backend & sent to SUS

After this step is it possible that the Vendor create the GR in SUS and it is sent to ECC for Approva through PI l??

Thanks

Kedar