More generally, this application can be used to convert any MNG file to a corresponding AVI file. This is usually done to save space. MNG files are lossless and are generally much larger than AVI files. Also, MNG is not as widely used as AVI.
The process has three steps. First, the MNG file is broken down into a series of PNG images. Then a VirtualDub script is built which tells VirtualDub how to build the AVI. Finally, VirtualDub is run to create the AVI.
You can download MNG2AVI from here. Please keep in mind that this application is a beta. Please contact me if you find problems with it.
Contact me at cakemeister at comcast dot net.