Pros:

+ Melee on backs of L4D Survivors
+Adds more realism

Cons:

- Conflict with custom head model addons

Conclusion:

This mod is AWESOME!

It would be cool, if this mod repaired Louis and Francis animations, when they hold an M-16 assault rifle, the AK-47 and Combat Rifle (Desert Rifle)

Pros:

+Melee attachments on L4D1 Survivors backs

+Francis and Louis rifle bug fixed

Cons:

-Conflict with custom head mods

Conclusion:

This mod is FANTASTIC!  I've been waiting for someone to do something like this for a very long time.