No one has an idea? IE8 is unfortunately still in use today.
You managed to catch us as our development team was out on holiday.
Unfortunately, IE8 does not support some of the CSS that we rely on to make Edge Animate projects play in IE8, so trying to work around it so that you can play them may not give you the result you want. The compromise we made to get Animate to its current feature set while still supporting IE8 was, as you pointed out in your original post, using the Chrome Frame.
That being said, you might want to try hacking in your JS files in your project's compositionReady instead of in the header of the project to see if that works at all. As you're probably well aware, you're in unchartered and completely unsupported territory here... (thar be dragons )
Has anyone ever had any luck with this?
I ran into this same issue over a year ago, and was never able to get Edge to work well with IE8. I had to move to a different tool altogether to get things to work with IE8.