"Start the LiveCD, wait for it to finish starting.
Then, add the stable repositories of bzr and qbzr in sources.list
(that's because the normal repos of ubuntu intrepid have very dated
packages.. at least of qbzr). So far, so good. Now, the normal
procedure to install bzr/qbzr:
"By now, you have both packages installed in your LiveCD
session.... but you want to be able to install them later on (like,
at the company without an internet connection, right?). So, what
can you do? Well.... let me tell you a little secret: If you didn't
clean after you installed the packages, you can grab all those
beautiful .deb packages (bzr, qbzr and their dependencies) from
this location: /var/cache/apt/archives/"