VB'2005 Project File Queries

As part of our build process, we've developed some control checks that
involve trying to make sense of Studio's vbproj and csproj files.
We've developed these to work with VB 6 and VB 2003, but now that we're
moving to VB'2005, we have to rejig them all over again.
So, how can(?) I detect the following /*solely* from the vbproj or
csproj file/?

1) References to assemblies that in the IDE show up as "Copy Local = True"?

2) References to source files that exist outside our [pre-defined] build
workspace (a.k.a. sandbox)?

3) Where was a GAC-installed assembly shadow copied /from/?
This last used to be available in the __assemblyinfo__.ini file hidden
inside the GAC, but this seems to have disappeared.

TIA,
Phill W.