The VMWare Movie Decoder is required for movies recorded/encoded with VMWare Workstation 5.
The VMWare Movie Decoder is provided free by VMWare, but comes with no support for it.
VMWare Workstation 5 is a virtual PC environment for running different operating systems and is often used by developers and software professionals for testing and development. It can record and playback all activity on a virtual machine. If you do not have a VMWare product capable of playing the recording, you will need this movie decoder to view movies recorded with VMWare.
http://www.vmware.com/download/moviedecoder.html
For ALPlayer information and support, please visit ALTools.