Hahah, glad you like your new title.
Well that would save part of the work, but still there has to be some data level conversion since the "mask.pcx" file is a black & white image which is literally used as a mask at the pixel level in their rendering engine, while mine is actually just a full colour image that is laid over the top of everything. So like I described earlier, when converting an old level, the mask.pcx has to be used to copy the graphics from the actual level background and paste them into a new file.
And as for the sprites, I would still need to interpret the gob data to know how to interpret the sprites.pcx files to find the images and their hotspots.
Those points are really where the bulk of the work is...