Need Help for quest achievement

[nodiby]

Hi everybody,

I put the Loki's achievement system on my server (http://rathena.org/board/topic/65641-achivement-system-with-no-source-edit/)

I would like to add new Achievements, but I don't know how to script the achievement when a player finished a quest. For example finish the quest sign.

I am also looking how to script the achievement when the player talks to an NPC and achievement for item used.

Could you help me?

Thanks for your time.