Reference GAC assemblies from web.config
How to reference assemblies in the Global Assembly Cache from your web.config (no dll's are needed in bin):
<system.web>
<compilation>
<assemblies>
<add assembly="MNissen.DataControls, Version=1.1.0.0, Culture=neutral, PublicKeyToken=e21df62f5c740a13" />
<add assembly="Web, Version=1.0.0.0, Culture=neutral, PublicKeyToken=e21df62f5c740a13" />
<add assembly="Services, Version=1.0.0.0, Culture=neutral, PublicKeyToken=e21df62f5c740a13" />
<add assembly="Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=e21df62f5c740a13" />
<add assembly="Microsoft.ApplicationBlocks.ExceptionManagement, Version=1.0.0.0, Culture=neutral, PublicKeyToken=e21df62f5c740a13" />
</assemblies>
</compilation>
</system.web>