89-94 you remove everything bolted/screwed to the ceiling,
remove the back window,
bend the bows so they come out of their holes,
then take out the five or so screws across the front.
yea yota headliners are bummers. i used to lock my keys in my bodydropped daily toyota all the time so i would always just pop out a corner of the lexan and after some point my headliner never got tucked back in.