You can't double the size, there is a standard size for helpfiles.
We could provide a link, however I would prefer that be in addition to an ASCII map, not instead of.
I'm not sure that I would like a map that was room-by-room accurate. It would greatly reduce the need to explore, and exploration was a lot of fun for me when I was new to the game. There's a point at which support actually becomes unhelpful; a crutch that prevents new players from learning to walk without it.
We have always left a fair degree of things unmapped so that you must "find out IC."