The Crysis Enhanced mod aims to provide the best experience for fans of the first Crysis. It primarily focuses on graphical updates and is powered by the partly revamped CryEngine 2 engine.
Here is the part 4 of the mod. Be sure to follow carefully the install guide provided in a separated download.
It should be CrysisEE.part4.rar
Not CrysisEE.part4.2.rar
Yeah, I was gonna comment about this also. The four parts don't extract properly through CrysisEE.part1.rar unless this file is called CrysisEE.part4.rar