eSourcing withSRM or eSourcing with ECC?

Hi, Just interested in finding out if anybody has implemented eSourcing with SRM or eSourcing with ECC.

1.How do you stop-deactivate contract,bid,auction creation in SRM so you can use eSourcing functionality?

2.Can you implement only eSourcing with ECC? Or do you have to have to have SRM?

cheers

alex