Alright, I'll play too. For many many years I had a massive slice. I was a baseball player attempting to play golf. A couple years a go I started to play more and started playing tournaments and I quite literally got embarrassed by the slice. Anyways, I was able to hit my 3 and 5 woods really well so I took a brand new Titleist driver to the local club maker and had him shorten it to the length of my 3 wood. He also put a crazy fat grip on it. Doing this caused my to stand closer to the ball. I have an outside in swing. Additionally, I read a post on another site who suggested that slicers place their right foot about 6 inches back of their left foot(staggered). These changes along with a slight change to my grip (make sure your thumb and pointer finger vees are aligned with your chest, both hands) made all the difference. My only problem I an occoccasional pull.
Don't know if what I did is recommended by others but it worked for me. Good luck.