Changes the names of PD2's difficulties to names based on/inspired by Duke Nukem 3D.
Also includes new descriptions for the difficulties.
Normal >>> Piece of Cake (A walk in the park.)
Hard >>> Let's Rock (Time to rock and roll.)
Very Hard >>> Who Wants Some? (Show them you mean business.)
Overkill >>> Come Get Some (You brought the big guns now.)
Mayhem >>> Ready For Action (It's between you and them.)
Death Wish >>> Damn, I'm Good (Spare no quarter.)
Death Sentence >>> Hail To The King, Baby! (You're the alpha and omega.)
One Down >>> I'll Be Back
