I have just uploaded a new version of the rules. Most of the changes are cosmetic (such as the character sheet) but there are some minor changes to the rules. The biggest changes are that Muscles is now called Body (I haven't changed this in any of the campaigns yet) and rolling a natural 1 on a D10 is now an automatic failure.

The latest version can be found at:
http://home.it.net.au/~zu/zombiesrpg/files/ZombiesMiniRPG.pdf