Let's try this again: cast L4D!
Here's my go.
Louis: Morris Chestnut. Age is a little old here, but that's always kind of been up in the air with Louis. Right look for him, though I'm still thinking this over.
Zoey: Mary Elisabeth Winstead. Would've gone for Stana Katic, but just a couple years too old for this one (sort of a running issue with getting these right). Winstead bullseye's the personality, though.
Francis: Adam Baldwin. This one was easy. Anyone who's seen either Full Metal Jacket or Firefly gets it.
Bill: Nick Nolte. See, I need to clarify if Bill's supposed to be Vietnam-old, or Korea-old. If older, go with Charles Napier.
Lemme know if you'd suggest some revisions. I'll fire away one for L4D2 on that board.