WP-34s: how to create/edit skins?

[r. pienne]

I'm playing around with the WP-34s emulator, but don't really like any of the existing skins, so I would like to create my own skin, or alter an existing one to suit. I see a skin file is in an XML-type format, but it looks really cryptic, much more so than a Free42 skin file. So I'm wondering, is there some special tool needed to edit or create 34s skins, or any documentation to explain the format? I've RTFM and glanced at the source code, but haven't found anything useful yet.

Thanks a lot.

R.