Reference problem in web project when using multiple solutions

[Jonas]

I'm migrating one of our systems from .NET 1.1 and VS2003 to .NET 2.0
and VS2005 and ran in to trouble we are using multiple solutions.

To clarify the problem, say we have three projects: SharedProject,
WebSiteProject and WebServiceProject.
I have two solutions where the two web projects have a
project-reference to SharedProject:
WebSiteSolution
SharedProject
WebSiteProject

WebServiceSolution
SharedProject
WebServiecProject

Now I want to make a third solution with all projects:
SystemSolution
SharedProject
WebSiteProject
WebServiceProject

In this solution the references to SharedProject in the web projects
are bin-references. This means that if changes are made to
SharedProject from one of the web solutions these changes will not show
up in SystemSolution.