The Mani Admin Plug-in can control the server vars by map.
This is achieved by placing a configuration file in the $BASE/cstrike/cfg/mani_admin_plugin/map_config/ directory. This is loaded when the specific map starts and is executed for the duration of the map.
If we had a custom map say cs_reflex3 and we wanted to change the freeze time to 0 and change the timelimit for the map to 15 minutes we would create the following file cs_reflex3.cfg
mp_freezetime 0 mp_timelimit 15
Any type of rcon command can be placed in this file.
WARNING !!!
If any server vars are changed, there must be a default value setup in the $BASE/cstrke/cfg/server.cfg to reset the value when changing to the nextmap or the values will stay the same.
For example. If we change to map scoutzknivez and set the gravity to be low in the file scoutzknivez.cfg and then change to de_dust the gravity will still be low unless there is a setting in the server.cfg file setting the gravity back to normal default values. Server.cfg is executed at the start of every map by the Counter Strike Source engine.