Pure win. I dunno how he did it myself. Probably just looked for the right key config for this encoding. I think it's UTF-8 or UTF-16?
More likely an ansci code (probably slaughtered the spelling there..) Anyway, the unicode / onscipter thing last I heard was still a issue (issue being the incompatibility).. But I've heard that Haeleth was/did create a modified version of Onscripter that DID have unicode support - but that it also wasn't released yet to the best of my knowledge (still in beta).
No real idea how much support it has, or if it's active/dead. And my own exposure to Onscipter is severly lacking anyway.