Hmm.. got Steve and your PMs.
In response, Bottles' Glasses, with some small modifications, should work for DK64 just fine. If you want me to check out the map in it, no problem.. just let me know the location of the data.
Edit: upon examination of a BK file model, apparently the header contains the root filename of the data! Should be helpful.
So... BG, by release, will view DK64 data too.
Edit 2: finished a model isolator for DK, working on the small parser tweaks to make it work.