Awesome - thanks.
If you have trouble creating such a project, let me know and I can make a dummy one for you to test with.
Since this is in a separate CMakeFile.txt in a subdir, and it contains a target, it would be nice if it was treated the same way as other targets.
In other words, a separate MyCustomTarget.vpj with the sources populated.
(Don't know if it's easy for you to backtrac to the sources from the dependencies)