Look at the example Emote_ files. You may want to make the states something like this:
stateName[0] = "Ready";
stateTransitionOnTimeout[0] = "FireA";
stateTimeoutValue[0] = 0.01;
stateName[1] = "FireA";
stateTransitionOnTimeout[1] = "Done";
stateWaitForTimeout[1] = True;
stateTimeoutValue[1] = 0.9;
stateEmitter[1] = playerNapalmFireEmitter;
stateEmitterTime[1] = 0.9;
stateName[2] = "Done";
stateTransitionOnTimeout[2] = "FireA";
stateTimeoutValue[2] = 0.01;
as then it loops and stays on the player type. Note that your emote will stop working if the player uses one of the /love, /hate, etc. commands or an image mounts to slot 3.