Replacing Driver's Side Window on a 2000 Buick Century

Thanks to Justin, but I was able to get the window in after maneuvering it. I was trying to place the window into the slot when the window was in the same position as it would have been after being installed. But what worked was rotating the window so that the narrowest end (the side that would face the back of the car) went in first; then after I got it about 1/4-1/3 of the way into the slot I rotated the window so that it would be in the "installable' position (yes, spellcheck, I know that's not a word.... thanks) and was able to get the window into the correct position. Once I did that I was able to move the register carriage to the position where the bolts to hold the window were in line with the holes in the door, slide the window into position, tighten the bolts, and get the window installed properly. Removing the window trim did help, although I'm not sure if it was necessary or not. Either way, removing the trim did give me more room to play with and ultimately make it easier to get the window into place. Job done. Thanks to all who responded with their input.

Glad you got it fixed, and for future reference, should you need to replace a motor/regulator again, get some duck tape and once you disconnect the window, slide the window shut and use the duck tape on outside of window over the top of the door and stick it to the inside of the window to keep it up out of the way....it may leave a little residue behind when you get done, but it will save you some hassle trying to fight the window