For info, I've written up "why use gdp" as it's something I've had to write a few times. <http://anonscm.debian.org/gitweb/?p=pkg-games/game-data-packager.git;a=blob;f=doc/why.mdwn;h=58e06b074a31fc38800c293709f8a3a50dedfc4b;hb=HEAD>