Sharing common code within Bazaar

[Wezyde]

I have been using SVN for quite some time now and I find it difficult to share
code between projects.  I believe Bazaar should work well for this, but I have
no experience with Bazaar or DVCS in general.

My project is within a Windows environment.

Here's an example.  I have 2 (or more projects) that are similar but each have
different requirements.  Some of the modules are identical across all of the
projects and some are hardware/requirement specific to a particular product.

Project A
  - Core
  - CustomA

Project B
  - Core 
  - CustomB

If a development makes a change to the Core then all projects using this core
should get the updates.

I would like to know the best way to implement this using Bazaar (if it is the
right tool for this).  

Any suggestions would be extremely appreciated.