I realised, after posting, that no-one would want to install a 'dead' mod to see it's one cool feature - AND that I miss that 'narrow mode' BG map a lot...
Sooooo - I've not much experience with mods other than VERY simple ones, but I've worked out how to rip out most of the code in BFC I wasn't interested in/which didn't work - and I've packaged up a seemingly working mod which ONLY adds the minimap functionality (narrow mode and 'in combat' and 'dead' map markers) - attached below in zip form.
There's probably still a tonne of stuff in there doing nothing (raid group markers are in there but not working atm for example) - but I got it from 250kb to just 75kb of memory and it still works (amazingly!)- so I'm pretty pleased :)
What this does with the minimap would be a GREAT addon to Cartographer tho - it really, really would - take a peek and tell me what you think - screenies of it in normal (with map markers) and 'narrow' (awesome mode) attached also.
I'll have to take a peek at capping - thanks for the tip (tho I'm still quite chuffed I managed to get my hacked BFC to work!!) :)
I still think that putting this into Cartographer would be a nice feature - it IS the ultimate mapmod - it already does the 'combat coloring' and 'groupnumbering' - making the map more readable would be even better surely?
Put another way - I'd really like a lot more people to be able to SEE the BG minimap - that way less people will stand around being useless ;) :)