you have to add the files that you want to the zips like:
right click on the file --> Winzip(if thats what type of unzipping program you have) --> add to zip file, or if you have a pre-existing zip then you can add to name.zip, and that will include all of your files in one zip.
However, the only extra files you may include in a zip on this site are your track, woodies, or cartextures. Nothing else, or if caught then your track will be deleted. If you want to include extra files you may link them to
www.coastercandy.com but be sure to give a link to them in the description of your coaster.
For anim8or or blender, you can get the programs here:
-Blender --
www.blender.org
-Anim8or --
www.anim8or.com