<p>After installing the VSTS Database GDR and importing a SQL Server 2005 database that includes the ASP.NET provider schema tables, I get the following warnings:</p>

<p>TSD04151: Procedure: [dbo].[aspnet_Users_DeleteUser] has an unresolved reference to object [dbo].[sysobjects].[name].</p>

<p>TSD04151: Procedure: [dbo].[aspnet_Users_DeleteUser] has an unresolved reference to object [dbo].[sysobjects].</p>

<p>TSD04151: Procedure: [dbo].[aspnet_AnyDataInTables] has an unresolved reference to object [dbo].[sysobjects].[type].</p>

<p>TSD04151: Procedure: [dbo].[aspnet_Users_DeleteUser] has an unresolved reference to object [dbo].[sysobjects].[type].</p>

<p>TSD04151: Procedure: [dbo].[aspnet_AnyDataInTables] has an unresolved reference to object [dbo].[sysobjects].</p>

<p>TSD04151: Procedure: [dbo].[aspnet_AnyDataInTables] has an unresolved reference to object [dbo].[sysobjects].[name].</p>

<p>Does anyone know how to get rid of these warnings?</p>

I'm not sure, but a quick look seems to reveal the following.
The offending line in the script seems to be:
Line 42 in procedure [dbo].[aspnet_Users_DeleteUser]
(how do you do underscores here?)
(like this: \_ )
(EXISTS (SELECT name FROM
sysobjects
WHERE (name = N'vw_aspnet_MembershipUsers') AND (type = 'V'))))
the system view sysobjects belongs to the built in system schema 'sys' which is not included in the database project. As a result the database project parser thinks (wrongly) that the reference is unresolved.
I don't think there is anything you can do but select to ignore the warning from the project settings. (Be aware that that will hide real errors from you as well.) I would probably just ignore the warnings.
Update:
Try to add a reference to:
C:\Program Files\Microsoft Visual Studio 9.0\VSTSDB\Extensions\SqlServer\2008\DBSchemas\master.dbschema