Here is the back weapons v1.87 plugin (Just for CS1.6)
Podbot Fullpack V3B22（Support CS1.6 and CS:Condition Zero）
CZ back weapons model for AMX mod X
And then I replaced a CZ model,now it supports CS:Condition Zero. But there is a problem, if you use the Podbot, it work wells, it will show the primary weapon on theirs back. But if you use the Official Zbot, you can't see the primary weapon on theirs back. Anyone who can fix it?