How exactly do you take the window rails off I took the screws out but I don't want to pull on them and break them so just just a little advice
I just took mine off not long ago. IF I remember correctly the back has a rivet that holds it in place and I think the top just pulls out if you slide it back/up.
See I have 6 screws I took them out and it seems like it's still stuck so I didn't know if it was Xmas tree clips or anything like that in them
There are clips that hold it down onto the pinch welds at the top of the door but mine just slid off once it was free. I am in the hospital away from my orange mustang bible or I would post some pics to help.