Custom text editor in RapidMiner

Hello Guys,

I set the rapidminer.tools.editor value to these:

emacs
/usr/bin/emacs
emacs %f
/usr/bin/emacs %f

but neither combination seemed to work. When I opened an R script from within an R operator, it just used the built-in text editor.
I'd prefer emacs because:
- I use a dark background, and a better font than what's available in Java GUIs
- it does parenthesis matching
- the editor can be enlarged easily, while the built-in editor can't be maximized
- etc etc

This is under Linux (Ubuntu 11.04, XFCE). I restarted RapidMiner after each try.

Is there any way to be able to use emacs to edit scripts that belong to the operators?