🚀 go-pugleaf

Thanks Sheila 
I checked out Microtype and I can imagine why your clients are happy! However, as a single person creating projects at home in my spare time, the prices for the add-ons are pretty steep (as much as a copy of Acrobat, for instance), so I think I'll have to battle on without them for a while at least. However, I'll definitely be doing a lot of reading from that site, as well as from Tim Murray's site. 
Thanks again for your input, Brian. Yes, the desired pop-ups are separate (in fact, I doubt that there will be any page numbering anyway - its not really a book as such). I planned on placing a link to the maps wherever required throughout the main PDF so that it would remain intact when the map was displayed, and the user would be at the same place when they returned to the main file. 
This project will be heavily updated on a yearly basis, so yes, I do want to do as much as possible from within FM. 
At this stage I'm still very much in the planning stages while I'm updating content, so I'm not committed to any particular method other than using FM then converting to PDF. So feel free to give any advice that you think pertinent. Maybe I should add that the final PDF product will be aimed at Win and Mac users, in case that raises any additional complications that I should be addressing at this stage (apart from the obvious like using standard 8.3 filenames etc).