Calm down, not everyone lives on this board 24/7. There are hundreds of threads about fitting ARB bullbars to 3rd gens, I'm surprised you haven't found any.
All you need to do is cut off the flat plate that is on the end of the chassis rails. You can do this by cutting the welds, or you can cut the plate around the edges so it is the same size as the rail. The instruction that come with the bar are customized for the Tacoma and are quite vague at times. PM me if you run into any trouble or have any other questions.