Steps to setup DRF to use Enterprise Services

Dear MDG gurus,

I'm trying to find a walkthtough on how to setup DRF to use PI WebService.

In my scenario I'm having a Custom MDG object (flex mode) and I am planning to Replicate it as a WebService to PI.

Please let me know if there is a suitable document for me to follow, or if you know the exact steps to configure the ECC system and the PI proxy class generation.

There is a document that explains the RFC approach, but the WebService one I can't find.

Thanks in advance,

Boris