Basically, a power slide turbo boost is when you go around a corner and you hold down the
r button and take the arrow buttons and hit them left and right really fast. I'm coming
out with a cheat for this soon.

A power slid turbo boost is when you turn and hold the r button and keep pressing the left
and right arrow keys

Thats right u do have to hold the r button then press the left and right arrow keys
rapidly.

Do what the comments above say but... It takes a bit of practice to get take the corners
right... Also, you dont need to press left and right on the control pad fast.. You can do
but it also works doing it slowly...

But the details don't really matter... As long as you hold l/r and press left/right... If
you do it correctly, you will get a mini - boost out of corners... Once you get good, you
can power slide around pretty much all the corners... But i always crash...! :)

Cant you also press up,down and get the boost too?
I seen that somewhere on this site