Multiple Modules with Duplicate Files

[mhallsj]

I've had CVS working great for quite a while now. But, I'm scripting
some things that I think CVS could maybe handle for me... Here's the
situation.

We have multiple modules that make up "projectX". 

A) Third Party package 1 - the real foundation for projectX

B) Third Party package 2 - has some directory names that are the same
as "A" (same structure), but no duplicate files.

C) In-House package 1 - has some directory names that are the same as
"A" (same structure), but no duplicate files.

D) In-House package 2 - has the same directory structure as "A" and
contains many duplicate files that we need to overwrite the files that
come from "A"

Side Note: I only want someone who checks out a project to be able to
commit changes to "C" or "D", not to "A" or "B", but all packages are
needed to build...

Currently, I have a script that exports "A" and "B", checks out "C"
and "D" and then copies them all into a new directory in the proper
order, so that the correct files will over-write each other.

Any sugestions?

-- Marc Hall