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[Nikson]

Here's what you could do. It's not a good solution, but it works:
Perform your operation and have someone sit next to you, pressint ctrl+f5 as fast as they can, during the whole thing.
Then download "TheRename", which is a mass-file-rename-and-converter, to change all the PNG files into GIFs.
Then use the Animation Shop that comes with PaintShop Pro to chain them all up and have yourself an animated gif.
If you need AVI or MPG for example, you can then use Adobe Premiere (I dont know if Windows Movie Maker can do it) to convert the format into .avi or anything else you want.

I should mention that I have done this once, with a 10 second sequence of PacMan.