Enable Streaming in Biztalk WCF Adapter -

I want to send a big blob from business with WCF service from some metadata.

I can control both the service settings and the bizotok settings independently, although I have to use HT to access the service.

Blob can be in Gigabyte range, so with the plain WCF BizTalk adapter BasicHttp or WSHttp is out of question since this message serializes XML in the message.

My current status will put the metadata in the first part of the budget multipart message in the form of XML and the payload in the second part.

P> To call the service, I prepare the WCF messagecontent and put the payload in the body to put the Messedata in the message headers. I can also set both "client" and server in "streaming" transport mode.

This scenario works well with the "normal" WCF client, but how can I configure Biztalk WCF adapter without layering it? Full payload in memory?

This can certainly be done with a self-written adapter, but I wonder if there is any way to do this with WCF Custom Adapter Plus one or two?