i bought a 1994 mobil home in oct o7.i moved in to it in dec o7. when the snow melts or we get rain the windows leak fomr the inside windows.there are double windows in mobil homes.what should be done to stop this??

I installed a 9'x8' Insulated door on a 12' tall wall. I cut the track that came with the door and installed a piece between the vertical that came with it and the elbow. So there is a 10' vertical section then the elbow and the remaining 3' after the elbow. The door opens perfectly to where the bottom of the door is just above the top of the door frame before it hits the stops. My problem is the ez torsion system is for a door that starts getting lighter due to the panels resting on the horizonal section as you raise it. So if i set my torsion spring to where it almost opens the door by itself it gets to where im lifting the whole weight of the door when its about half way up. Other than installing counter weights like on the old time windows that were inside the walls what could i do? Is this to much stress to expect any garage door opener to lift? Thanks Eric P.S. Sorry for the length post but its hard to describe my specific problem.