Everything except the cardrank can be modified. Mine was 'from scratch, except I didn't redo the cardbase files with this deck, but they certainly can be. I spent upwards of 12 hours on this deck already, in it's current state. That is pretty much 'from scratch', IMO.
I was trying to replicate the stars standard deck, with some better cardsuit images, and deck images. You can't do a lot with a white cardbase, to fancy it up. It MUST be pure white (hex# ffffff) so that BetPot will work with it, also.
I plan on making another deck or 2 in this style/base. I have some ideas I want to try and test, to see what is truly possible. The only other person I ever saw mod this deck base, never published them publicly. He also was never able to create his own text files to use with the standard deck.