I've got an install with czero and cstrike both in the same hlds_l directory on linux.
When I first installed amx mod x there were several files that it apparently required that caused the server to crash. Those files were all in the cstrike directory, but when they were moved, I seem to be missing a few select files still. This file requirement seems to be some sort of bug, because a normal czero install doesn't seem to have these files.