Make the Door event, set the graphic to the door you want. Set the event to change the graphic to the next stage in the door opening, then the wait command within the "Set Move Route" menu (I find the default frame count it has works best), repeat it for the others. Set "Wait for Move's Completion", then use "Transfer Player" and select where they're moving to. You can add a sound effect in there somewhere if you want.
Personally responsible for the IRC server move. 11/24/10
That's the problem with you immortal types. You wouldn't get a pop culture reference if it skittered up your neck and implanted an embryo down your esophagus. ~ Harry Dresden