First, add a guard and assign him a 04XX action block. Make sure you notice what guard ID is shown. Now is where it gets tricky. Open the objects window by Edit Setup -> Edit Objects. If you want to add a key, add a 04 object. If you want him to give you a weapon, add a type 08 object. We’ll add a key, type 04 object. Change the preset to “Attached to Guard”, and choose the guard ID we selected. Also modify the Locked Door tags in the bottom right, so you can match to a locked door. Now add a 16 object tag. Choose this key we found before. Add a type 25 object, the Rename Object.