There is really no simple way to safely extend dmNavigation because it is core to everything else - and you don't want to modify the core version of dmNavigation (or of any FarCry core type) because then you will be faced with all sorts of troubles when you next upgrade (for bugs or whatever reason).
As of the next build of FarCry, you will be able to extend any of the core types withouth modifying the core code. Tom Cornilliac has implemented this changed and is going through testing at the moment. Basically you will be able to add aditional properties to any type, add custom edit/delete handlers by coding a dmNavigation.cfc for example, that extends the farcry_core dmNavigation.cfc into a system directory under your application (eg farcry_test/packages/types/system/dmNavigation.cfc)
More on this later but thought you might be interested to hear what's coming :)
-Brendan http://farcry.daemon.com.au
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MXDU2004 + Macromedia DevCon AsiaPac + Sydney, Australia http://www.mxdu.com/ + 24-25 February, 2004
