> for switching between keymaps you should use Keymap.sbar which can you
> download from my homepage: http://tokai.binaryriot.org/public/

I think he does already:

"I've also installed sbar_keymap v20.6 (http://tokai.binaryriot.org/public) and using it's character palette I can see the Greek characters after the latin ones (which means that my font does support Greek), but even if the keymap is swapped fine, I can't write in Greek."