Integrating SAP PO with NWDS for BPM Development

Hi Guys,

I am in need of some pointer to work on BPM using NWDS.

I have gone through various discussion and links speciallaly from William but what I am confused about is how to integrate SAP PO with NWDS.

I understand that we need to connect SAP PO using preference menu in NWDS but how the flow actually works?

We have to create few SOAP(XI) channels but where and how to use them.

I have these basis doubts since I dont have any sandbox server with me as of now to test it.

Please provide helpful answers.

Thanks

Anand