I'm handicapped also and have a hard time opening and closing the hatch. Are you looking for a better way to open the hatch or just a hand hold ? A friend of mine ( Pineapple ) has come up with a way to open the hatch from the side. If you're looking for just a hand hold I don't think there is a strong enough spot to mount a handle on the hatch
Here are some pics
http://community.webshots.com/album/81289206sQoviD