On my boat, the main halyard exits the mast and is attached to the car on the short track with a bowline. The tail of the bowline dangles below the car and ends in another bowline. The trick is to attach another long line with a bowline to that lower bowline, put the new line on the winch and winch it down slightly so that you can get the top bowline off the hook on the car. now you can release the line and feed the knots through the slot in the mast as the halyard goes up and the sail comes down.
With practice it's not hard.
If you have a ripped batten pocket it sounds like you need to take that sail to a sailmaker and have him go over it and repair any suspect spots.