Get this guy to install CS3
no, just a joke
There is a way to translate CS3 projects into AE7 projects.
Open CS3 project and a similar AE7 project in a text editor and change the things that are different in the CS3 project, save as .aep and open in AE7.
But I think in your case it’s easier to do what Darby said.
vanderzee.tv