If you're accuracy is good then getting some lift is pretty straigtforward. Here are some checkpoint for you:

1. Tee the ball up nice and high. The top of the clubhead should be level with the mid-point of the ball. In other words the top-half of the ball is above the top of the clubhead.

2. Make sure the ball is forward in your stance. The ball should be level with your left foot.

3. The driver should contact the ball after it has reached the lowest point of the swing. The club should therefore be on it's way upwards when it reaches the ball. If 1. and 2. are right then this will help you achieve 3. which will result in elevation on your drives.

Hope this helps

Paul