http://podbotmm.bots-united.com/doc_v3/html/pbmm.html
There is a paragraph about auto add/kick bot function. There are the only features they are directly included in podbot mm. If You need another way of adding/kicking bots, You have to use external plugins - like this one I wrote for AMX X:
http://forums.alliedmods.net/showthread.php?t=71959