To be honest - if I can get it to work (the conversion on a Mac) I will probably end up doing a series...
I doubt if I will get it right first time anyway.
For teh experienced player grids are ideal - especially if you print out a version so you can quickly check (part of my idea is to produce a PDF print version)...
For the newbie though, zones will probably work better at first.
When I get em done I will post the links up here - be nice to have your comments.