A few months ago I wrote a script to rebuild the archive using cowbuilder. This script had a subtle bug: If you where running a sid machine and wanted to rebuild testing, the script would fetch the sources from sid (via apt-get source) and build this package in a testing environment.
Thanks to Gregor Herrmann (Currently unassigned NM with \~180 packages in the archive!) this bug is fixed now and it should be possible to rebuild the archive correctly for every host/build-environment combo.
To rebuild the archive, just get the scripts and
sudo aptitude install cowdancer grep-dctrl sudo cowbuilder --create --distribution lenny --basepath /var/cache/pbuilder/testing-base.cow ./getlist lenny # get the list of packages ./buildall list.lenny.i386 lenny # build all packages in list.lenny.i386 in a lenny environment
Thanks Gregor for your patches and good luck with your NM process!