fist, add new define (map.h) (const.txt)
enum {
RC_FORMLESS=0,
RC_UNDEAD,
RC_BRUTE,
RC_PLANT,
RC_INSECT,
RC_FISH,
RC_DEMON,
RC_DEMIHUMAN,
RC_ANGEL,
RC_DRAGON,
RC_BOSS,
RC_NONBOSS,
RC_NONDEMIHUMAN,
RC_MAX
};
RC_Formless 0
RC_Undead 1
RC_Brute 2
RC_Plant 3
RC_Insect 4
RC_Fish 5
RC_Demon 6
RC_DemiHuman 7
RC_Angel 8
RC_Dragon 9
RC_Boss 10
RC_NonBoss 11
RC_NonDemiHuman 12
second, see what you want to do in next
third, compiled and test.