Help with slideshow (noob)

im working on a header for a webpage which cycles through a few images.
the site can be viewed here
caproof.dslmarketing.com

i had used a flash slideshow which loaded the images from left to right.
i would like to change the transition effect to a fade instead. im not sure how to modify my current .fla to achieve this effect.

http://caproof.dslmarketing.com/flash/rotation.fla

i know this is an amatuer question but i just want to modify what ive already made without starting from scratch!