I've been trying to do that as well, but I get stuck after
Code:
$ git clone http://github.com/ps2dev/ps2-packer.git
$ cd ps2-packer/
$ make
which was originally
Code:
$ hg clone https://bitbucket.org/ps2dev/ps2-packer
$ cd ps2-packer/
$ make
By the way, since the ps2dev folder has been created by root, I had to sudo all of this, don't think it's important but...
Code:
Makefile:3: /Defs.make: No file of folder by that type
make[1]: *** No rule to make target « /Defs.make ». Stopping.
make[1]: leaving directory « /usr/local/ps2dev/ps2-packer/stub »
make: *** [stubs-tag.stamp] Error 2
(Might not be the exact output you'd get, I translated this from my french configured Ubuntu, it originally was 
Code:
Makefile:3: /Defs.make: Aucun fichier ou dossier de ce type
make[1]: *** Pas de règle pour fabriquer la cible « /Defs.make ». Arrêt.
make[1]: quittant le répertoire « /usr/local/ps2dev/ps2-packer/stub »
make: *** [stubs-tag.stamp] Erreur 2