Constructing trees from several repositories

[HMahaffey]

I was trying to construct a build tree from modules checked out from 4 
different repositories.  I checked out the first to lay down the base, then 
went into various subdirectories and did "cvs -d $repos2 co repos2_src" and 
created my tree.  What was cool was that I was able to go to the top of the 
tree and do "cvs update" and it would do updates from each respective tree!  
Very nice!

I was a bit disappointed when I ran the initial checkout again like I did 
when I first created the tree.  It worked fine until it would enter a 
directory from a different repository, say repos2, and would complain that 
the module I was checking out didn't exist in repos2 (which was true).

Why couldn't CVS ignore directories from repositories different from the one 
at the top-level being checked out?  [Did that come out right?  ;)  ]

Essentially, I'm trying to create a tree from repositories belonging to 3 
different companies.  Each company owns different subdirectories (I know, I 
know, not the best layout).  I could check everything out and write a script 
to move things around, but I still get errors when working on my local copies 
of code I'm allowed to update.

Thank you for your time...

:)hal mahaffey