I used the previous answer to replace the motor and regulator on my 1997 Plymouth Grand Voyager on May 28, 2009, and it was very helpful.
However, I think I can improve on that answer with a few additions to the previous gentleman's existing text. (I've separated his text to make it more readable, and, again, added some things in [brackets] which might be of help.)
1. Not sure if you can change just the motor i think you have to get it with the window regulator so the complete window regulator and motor assembly may have to be changed 2. I just changed this in my grand daughters voyager 3. First thing is to remove the door panel tools you will need a #2 Phillips head screwdriver , a flat blade screwdiver there are two # 2 Phillips screws in the panel that contains the window and lock buttons one just above the door handle and another in the top front of this panel visible only with driver door open 4. Remove both screws then you can lift this panel out unplug wires from panel lay panel to side there is one screw now visable behind door handle remove it. [Be very careful unplugging these wires; you want to make sure you don't break the plastic tabs. If your car is old, the plastic may be brittle. I used a bit of WD 40 to loosen the plastic parts. You might have to slide the orange tab away from the center, the lift the cream-colored tab over a black nub to successfully unplug the wires.)5. There is one screw in the door panel where you grip to close the door remove this screw also . 6. Then there are plactic locking plugs that hold the panel in place gently grip door panel at bottom and pull sharply you may have to insert the flat screwdriver in bottom of door to help pry the plastic door clips out. [Note: you cannot see these plastic door clips when you're removing the panel. Instead, there's a very small open slot at the bottom of the door where you would insert your flat-blade screwdriver and very gently begin prying the panel loose.]7. Work your way across bottom of door then work up each side of panel gently prying the clips loose 8. The door panel should at this point swing freely from the top. 9. Swing bottom out lift upward this will come free from door and slide up over lock button 10. Then the door handle rod must be unhooked from inside door handle11. Only the white plastic clip can be snapped loose 12. Then door handle rod can be pushed down out of handle (this will free door panel from door) 13. Set aside [the door panel].14. Inspect door panel clips for damage (they can be purchased at local parts house) 15. There should be a heavy plastic flim covering door (this is to hold down dust) this must be removed. [This requires a lot of gentle pulling; you definitely don't want to rip this. You can buy replacements if needed, but if it's an old car, you don't want to do that. The plastic film was very securely attached with adhesive when I took it off, but the adhesive didn't re-adhere when I replaced this film; I had to use a lot of duct tape. I recommend Gorilla brand; Popular Mechanics magazine recently rated it the best.]16. You then will see door motor on out side of door. 17. There are 3 # 10mm bolts holding motor to door; remove these. [Note: it probably depends on the car, but mine were not #10mm bolts, they were Torx head bolts. I needed a T-30 Torx head driver or drill bit head to remove these. In fact, removing these took up a lot of time, as they were connected to rubber-covered nuts in the rear of the panel. For me, they loosened easily, but would not come all the way out. I had to raise the window, then use vise-grip pliers to clamp down on the rubber-covered nuts to get enough leverage on them to remove the bolts.]18. Look inside of door at each end there are up rights for the regulator attached to motor by rubber coated cables (there are black plastic things attached to the cable that run up and down the metal regulator bars) 19. You will see a clip pin inserted thru the black plastic holder (this locks on the pin that holds the window in place) 20. Remove pin from each one. [Over time, these pins get tightly seated into the surrounding plastic holder. I removed these by inserting a flat blade screwdriver into the end of the pin, and pulling to the outside; that worked. You may have to use more torque on this maneuver than you'd expect.]21. Gently push window away from plactic holder22. The window is now free. [You'll want to push the window all the way up.]23. You can block it in place with a rubber wedge, or have some one hold window up until regulator is removed. [I used two rubber wedges inserted into the window gasket where the window rolls up and down. Again, the trick is to pull the window up as high as possible.]24. You can see two screws they are the ones with large heads set in slot so you can loosen them and slide them up and out at top and bottom of regulator bars holding the regulators in place 25. These can be partly unscrewed lift metal regulator up until the screws will come thru the holes. [Or you can remove them completely for an easier job; your replacement regulator will probably come with new bolts anyhow.] 26. You can remove them completely if it seems easier for you then just turn them so they come out thru the door; trial and error is the best way to get them out. [There's a bit of maneuvering required to remove the old regulator; you have to bend the thing to the right, then the left, before gaining enough room to remove it.]27. You could use an extra pair of hands for this job [He's right; but the most help will be in lifting the window up to its maximum height; otherwise removing the regulator is very difficult.]28. Every thing stated above must be loose before the metal bars will come out29. Remember where every thing was so you can reverse procedure to reinstall regulator. [I found I needed to install the replacement regulator by inserting the right upright first; when I did the left first, the right wouldn't fit in.] 30. Hope this has been of some help i had never done this kind of thing before it took me 1 3/4 hours start to finish. [It took me closer to 2.5 hours; again, I had some trouble removing the motor bolts and unplugging the wires without snapping off the tabs.
[The one thing I would add is that before reinstalling the door panel, you should test the motor with or without locking the window to the regulator bars. Simply plug in the wires you removed in Step #4, turn on the ignition, and push the window switch. It should make the black plastic window holder on the regulator bars go up and down.]
31. To reinstall reverse removal procedure
REMEMBER WHERE EVERY THING WAS SO YOU CAN REVERSE PROCEEDURE TO REINSTALL REGULATOR HOPE THIS HAS BEEN OF SOME HELP I HAD NEVER DONE THIS KIND OF THING BEFORE IT TOOK ME 1 3/4 HOURS START TO FINNISH
TO REINSTALL REVERSE REMOVAL PROCEDURE GOOD LUCK JR PS IT MAY BE EASER AND QUICKER FOR YOU AS SOMEONE HAD REMOVED REGULATOR AND MOTOR AND BLOCKED WINDOW UP SO I HAD NO IDEAL WHAT IT WAS SUPPOSED TO LOOK LIKE OR HOW TO INSTALL IT