If you're using the zsh shell, add this to your ~/.zshrc:
open-rox-cwd() { rox } zle -N open-rox-cwd bindkey '\e[24~' open-rox-cwd
Now, pressing F12 will open a ROX filer window showing the current directory (even in the middle of
editing a line). The actual keycode (the odd string after bindkey) varies by terminal; press <Ctrl-V> <Key> at a shell
prompt to see what it should be (replacing ^[ with \e).