delete a specific spawnid

[AlterEgo]

hi, ive a newbie trouble and sorry for my bad english.
i have made a custom_npc and i want unspawn it when an event occurred..
i know the id of npc and the spawnid, now..how can i do it?

ive see deleteMe() and is right for me, but i dunno how use my npcid for made one l2npc obj to do .deleteMe()..
any help is appreciated..
ty in advance.

ae