Basically you add the project without adding the WSDL
Then you Right-click on the project and you add a new REST service. If you are working with a svc file generated by WCF then you need to get hold of the SINGLEWSDL version of the service, not the WSDL (well, this was the case with mine). The singlewsdl will give you all the services and their parameters
From then onwards you have to add these manually, with the base path for each service as follows:
/service.mobile.myboardpack.com/BoardPack.svc/doLogin
where the service is 'doLogin' for example.
But I haven't got it working in full yet.
For the GET methods, it is working fine, but the POST methods are returning errors, saying that I am not submitting the data in the right format. It tells me that there is a problem deserialising the content and that the data is not submitted in JSON format. I am still trying to get around this.