Kirupa "sliding menu" problems

The reason why I am posting is because the files I downloaded with this tutorial are corrupt and did not open. pls let me know if I need to explain something else to get a response. I do not know what you would need to understand this and I am desperate for help.

I am attempting to apply the Sliding Menu by kirupa from 19 February 2006 to my new site and I am a little confused about some of the code.
Two things are important to know. The first is that I have the code from Kirupa on my actions layer in addition to other code which also controls the sliding menu by a sliding bar beneath the gallery. There seems to be no problem with either code independently and before I added the Kirupa code the menu worked perfectly, but I would no know if the two could cancel each other out…could my other code make the kirupa code not work even though different elements are controlled and there does not seem to be any mistakes in the code?
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Please see attached image for the layout of my page with buttons (kirupa code) and the slide beneath.*

The second consideration is that there is a mention of “onEnterFrame” and “your input movie clip, input” and “menuSlide =function (input:MovieClip)”. I do not understand when/how the “onEnterFrame” was created, did I miss something? I did not see when/how an input move clip named “input” was created and I do not understand if “MovieClip” refers to a specific clip I am supposed to cerate or if it is a general part of the code.

Thanks in advance for any help.

To see the original code and tutorial if this is confusing go here:
http://www.kirupa.com/developer/flash8/slidingMenu.htm