Need HELP.....Please!

im tryin to upload a pic, but its just the drivers door window( rolls up and down). its clean no chips or anything, regulator is already in the door. fuzzies look ok, channels look ok. i think i got that far, but my question is... how do i get the window in the channel? do i have to take out the wing, install the glass then reinstall the wing? or is there a secret im not aware of?
thank you for your time