Help install my window please

how do i get a window in both tracks without breaking it? my '94 jeep cherokee, 2dr, was vandalized and so the passenger door window has to be replaced. i have been asking all over online for hours and no help so far.

Remove the front vent window frame screws and tilt the frame and window back and remove it. Once the new side window is installed, lower the window and reinstall the vent window and frame.

Tester