Because as always, time is tight.
Thanks everyone for your input - I've just done a rudimentary table dump with UnIcon, so it looks like it'll be the winner. Especially since the first demo program I found did almost exactly what I'm after :) So we have a solution!
At least, it'll buy us some time til we have to pay a lot to implement some kind of kludgy closed-source solution, or something :-)
Phew, software-project-in-near-panic goes right back to 'on track...'