Lineage 2 Tower Forum

Hello guys, I would like to know how do I find this MENU_SELECT a certain npc. This script has the coordinates to select the "Join Match" option of npc "Olympiad Manager", and would like to do this with other NPCs.

TargetNpc("Olympiad Manager", 31688);
Sleep(250);
Talk();
Click("menu_select?ask=-51&reply=0", "Join Match");