There isn’t really a way to do this yet, but we’ve discussed the possibility a few times here. The “new project templates” are designed to work this way – we author them using a generic name here, and the project wizard will rename all of the files and classes automatically for you. Templates work with this feature, but Sample games do not. It should be fairly easy to rename the project itself. What is going to take the most time is renaming the actual C++ classes, and adding class redirects where necessary so that any existing content will still work with your new class names.
–Mike