Okay, I had a quick look. Cr2Editor seems solid, but Cr2Builder looks much more powerful, produces smaller files and is a bit faster when saving. So I'll go with that unless I come across any really bad quirks. They both work significantly better on a Windows system running on VirtualBox than under wine, which I can live with. Many thanks again for the links!

So, this is supposed to be a free program, right? I didn't see a license or anything, but the readme is in Japanese, too, so I'm kind of helpless there.

Edit: Hmm, I have to say, though... Poser File Editor 3 looks pretty tempting, too, and it's not that expensive. I might give it a go. I'm sure there'll be much need for down and dirty file editing - if not for the base .cr2, then later for pose files, morphs and whatnot. People tend to rave about the quality of Dimension3D's tools, so I can't imagine I could go wrong with this one.

-- I'm not mad at you, just Westphalian.