Changing the colors in Motion Templates

I'm using Motion 2.1, and I'm just a basic user (I rely mostly on templates to just create quick and easy openings and such). But this time I'd like to take it a little further, and customize a template.

I'm using the satin opening, with the blue billowing satin. I'd like to change the color to a turquois/teal (to match a friend's wedding).

I started by just looking through the inspector, to see if there was an easy little color tweak option. No luck.

So I looked at all the layers and media carefully, and though, well, maybe I can open up these .psd's in Photoshop, change the color there, "save as", and replace the media in Motion. But, as it turns out, only one is a .psd. The rest are .mov!

Given that it's a finished Quicktime, I'm guessing that there's nothing I can do to change the color at this point - BUT, that's why I came here. If anyone knows a way that I can change the color of the satin template, please let me know. It would just look so much better if it matched...

Thanks!