Passenger door lock switch

[NIKAS]

Kind Sirs, need a helping hand in diagnosing some problems. Here is the trail of annoyances:

Upon unlocking the car, the passenger window began intermittently auto-lowering when guests opened and closed that door. I'd have to manually crack their window a bit before and after to be sure and avoid the discomforting glass overlap. I lived with that for awhile. About the same time, the external passenger door handle became temperamental - I could manually open door lever from inside car - by reaching across from driver's side. Or if I turned car off and on again it would sometimes work. For a brief while I outsmarted these pesky actuators by pressing the "never-used" central locking switch - which successfully unlocked their door - for awhile. Not so anymore. Additionally, it now sounds like the passenger window regulator is beginning to pack it for good. Probably the 3rd or 4th time over 8 years and always the passenger door for some reason. Anyway, obviously I will be ordering the new window regulator. Q1. How does one get the door to open to install it? Q2. Does it sound like all three door actuators are shot (central lock, inside handle, outside handle), or is it the whole door lock mechanism? Anyone else had this ensemble issue? Help appreciated!