>Luis, thanks for the idea!
>
>I've just found something that called "WSDL flattening" -- that's probably the approach you described in your reply. It seems that .NET 4.5 has means to do such flattening, and for earlier versions there are 3rd party tools. Will try tomorrow, hope this will resolve the issue.

No worries, you are welcome. I think we will upgrade to 4.5 but in case our request is denied I have also downloaded a sample from http://my-tech-talk.blogspot.com.au/2008/07/adding-flatwsdl-to-wcf-webservice.html I am guessing that is one of the websites you read.

If you can, please let me know how it goes, if it was easy to implement.

Cheers,

Luis