In flash0:/vsh/resource/
There is a file:  custom_theme.dat


What is this file responsible for exactly?
Obviously, it must have something to do with the .ptf themes.

But does anyone know exactly what it's responsible for, and what information it holds.
I opened it up with Hex Workshop, but nothing in there caught my eye.
(Well I did see something about cookies.ptf, but nothing else stood out)