dual stage door locking on Highlander 03

Does anyone know how to make the Toyota Highlander 03 have the same feature as the factory remote?. If you press unlock once, only the driver door opens. Upon pressing unlock a second time within 5 seconds all doors unlock. How can that be done with an aftermarket alarm? Will just 1 relay and two diodes do or do I need some more stuff for the dual stage locking/unlocking? Also will the buzzer sound, signifying "door ajar" and not lock unless alldoors are locked? (with the aftermarket alarm?)   I read on a closed topic about this but had two ways, but only the easy way was posted. I want to know the other way with maximum features. Thanks

1.i notice DEI makes this feature. the normal unlock wire goes the driver (**A) doorlock motor. then another unlock wire which comes from maybe a programable aux wire to do 2nd unlock which tie to the main(**B) unlock wire. (**A)|     UNLOCK MOTOR|blue/red            |   |17 pin plug, pin 2 @ BECU *1| (**B)|     POWER UNLOCK|document #1070      |   | link for doc #1070 *1 The BECU (Body ECU) is behind the glove box, it is the module to the right. 2.understand where ur question but cant help you...sorry Houston,TX

"The two most common elements in the universe are H+ and stupidity" (Ellison).

Doc 1070 is the perfect answer to what I am looking for. Got to try it. Thanks.