I downloaded the latest version of Away3D 4.0 and I am using flash cs5.5. I tried setting this up based on the tutorials listed on your website which take me to flashmagazine.com Installing Away3D for Flash, Flex or Flash Develop.

To make a long story short that particular tutorial seems outdated and I was wondering what I need to do to set up Away3D. 

Flash player 11 beta was just released, so this tutorial might be outdated as well, but if you have incubator and haven’t installed the new flash player, this will work.

http://www.allforthecode.co.uk/aftc/forum/user/modules/forum/article.php?index=5&subindex=1&aid=263

Edit: I realized you are using flash cs5.5 for development, but I think the steps should be similar. This is the only thing I could find for flash cs 5. http://blog.kaourantin.net/?p=104

Hello,
testing FB5.5 - away3d in my AS project´s src.
Desperately trying to find some solution or better information about the impemtation steps:
not there - not appearing - not implementing:

(com.adobe.utils is also copied into my src, and lib/apparat-lzma-decoder-1.0.RC8.swc added in the Library path) - where is display3D?