you add a ScriptedTrigger(its in aiscript) dubble clik on it and xpand the tab aiscript. in Actions, click add. open the pulldown thing and go to the bottom and select WaitForEvent. then click New. A few extrat properties will show up. set ExternalEvent to whatever you want, like CueSevsVoice
then add another action and make it PlaySound. Hit new, and add your sound
For the door. go to actor classes and expand activateitem. expand DemeolitionCrate and choose one, then add it to your map. back to activate item, expand explosivecharge. get a DemolitionCharge and add one of those. then go to MarkerIconActor. keep expanding until you see MarkerDemolitionNative. expand that and edd a MarkerDemolition to the map. dubble click on the marker(it lokkes like a hologram) and go to marker. a big list shows up. Keep the marker's properties up while you select the charge. Back to the properties: select Anchor and hit Use selet actors then hit add then use. x out of marker properties and bring up the charge's properties. Select the holo, then go to the chrage props and expand marker goto squadmarker, then Use. go up to Explosivecharge tab and then select the demolition crate select proptodestroy and hit use.
Now the hard part's over. go tothe static mesh browser and select the one you want. dubble click on the crate and go to display advanced, select StaticMesh and hit use. Your Demolition crate is now a door. mve the marker up to the door, and put the charge in front of his hands. BuildAll, Save, and test it.