well I just found this topic and I can't believe nobody mentioned Custom Desktop Logo
you can use a stacks of .pngs in the same folder for creating the animation still perfectly working on my W7 !

KO Approach was shareware until February now is "open source" !

well I really cannot imagine to use Windows without running this application
actually I paid for the full version but migrating to W7 I found that the validation procedure is not more usable
any way the free limited version is still there >  
http://www.ko-sw.com/Products/Approach/

I contacted the developer Kirill Osipov well he was so kind to give me the link to the source code ...
https://github.com/kerido/koapch/tree/master/_src

My bad I really don't know how to use a source code

I hope the good developers here can give me some advice or instructions
 
or best of all have the time to compile the open source application KOApproach from the source code
(the full version without limitations)
https://codeload.github.com/kerido/koapch/zip/master

thanks in advance !

I searched around but I didn't found an answer to the question: how to run 2 instances of CustomDesktopLogo with 2 different setting
I already tried to start 2 different versions from two different folders but changing the settings of the second was always overwriting the first one ...
any tip will be appreciated ! thanks