CSB Multimod Manager lets one server rotate through several mods by map prefix. At map start it reads a mapping file and, for every block whose prefix matches the current map, execs that block's server .cfg and amx_unpauses its plugins; non-matching blocks are amx_paused. So kz_, deathrun_, surf_, zm_ and jail_ maps each get their own plugin set without hand-swapping configs.
addons/amxmodx/configs/csb_multimod.ini (prefix, cfg, plugin list per line).csb_mm_reload.addons/amxmodx/configs/csb_multimod.ini with lines like kz_ kz.cfg kztimer.amxx;kz_hud.amxx.csb_multimod_manager.sma, copy it to addons/amxmodx/plugins/ and add it to plugins.ini.