Zetec web-site questions:

What do I need to down-load to see some of the files in the Gallery?

For the .avi and .jpg files, probably nothing as media player should load up when you try and run the first and your browser will support the latter.  For the .sld*** files (where *** can be prt, asm or drw) there is a link to SolidWorks in the down-load dialog box which will direct you to a place where you can pick up the correct viewer for your system