ZSerpent series part 1 addon

Included in this file is the entire contents of the ZSerpent series from 5b to 20. In total, there are only 14 maps and part 2 will contain 8 more.

Despite my best efforts at the time of assembling this pack, I could only find those included, as to my knowledge, Z1 to Z4 existed but their download links could not be found, even when I was aquiring these when the crytek website was still modder friendly.