This is an interesting subject, and as Rich says, there is no need to reprint the entire book - just the second half with the architect listings and the course index. I suppose if Ron has updated it then the task of vetting it and getting it into a format for some sort of on-line database would only be gargantuan instead of brobdingagian!
I know the issues associated with this sort of research, the Mackenzie work I am assisting with is very time consuming, guys like Brad Klein researching Ross, Philip Young with Tillie, Wayne Morrison with Flynn, Tom MacWood with a whole host of interests, the work is massive. The advent of searchable newspaper archives has been a boon that simply wasn't available when Ron and Geoff were researching The Golf Course and then updating the info for The Architects of Golf. That they got as much right as they did is a real credit to them. As far as their listing for Mackenzie's courses, I would say that while there a few that are wrong, it is where they have not included (through lack of information) a whole lot of courses Mackenzie designed and consulted to, that their list is lacking. I am sure Ron has got onto most of these in the meantime.
I would certainly subscribe to such a database if it was made available online, but its Ron's info to do with as he sees fit. I just hope, for the sake of golf historians, that the info can be distributed in some way that can provide him with some recompense for his amazing work over the years.
cheers Neil