Since this project began way back at 5.x, and was first released with 6.0f, it is not structured for ESP. I looked at converting it when 7.0 came out, and it is not a straightforward process in my case. I have a base set of code with about 10 variations. With the command line tools, I can create a build script that allows me to share the base code and use the build script to shift in the pieces needed to build each variation with its small portion of custom code and custom web pages. There was no way using ESP to do that. I would have had to have 10 independent projects and copy the majority of code between them, making maintenance a nightmare, so I left the project as an old style project.
All that to say, no, I can't use the fancy new ESP features. I wish I could, it looks like a much nicer development environment, but it isn't well suited to this project.