build self-contained repository for offline use

[Hamish Moffatt <hamish@debian.org>]

I need to build a repository to allow some specified packages to be
installed on computers without internet access. It needs to contain the
specified packages plus any dependencies (new packages and new versions)
from squeeze plus other repositories such as squeeze backports and some
local ones.

I want to include everything beyond a basic squeeze install. (Ideally I 
can feed in a list of stuff to be excluded.)

Does anyone know a tool/process for doing this?

thanks,
Hamish