So much facepalm. Okay, this is why editing hildon.menu is dangerous(TM), and can cause unhappy things to your device. Such as it self destructing in your face. You're lucky you're still alive. Now, very carefully (and don't shake the N900 too much when you do this, because it is armed and highly volatile when Hildon Menu is messed up) open your N900's keyboard, press Ctrl+Shift+X (at the same time), and this should open up X-Terminal. I HIGHLY emphasize the carefully part - messed up hildon.menu causes a bug where the battery is caused to slowly overload, and if bumped too sharply, it can explode. Then, type: Code: cp [path and name of your backup of the original hildon.menu] [the path and name of the hildon menu file you messed up] And please tell me you made a backup. If you haven't, let me know and I'll see if I can dig-up a default hildon.menu file for you. I would recommend, from now on, that you install ApMeFo FIRST, then look around at the file structure it creates in /home/user/.config/menu/ - and only then modify stuff after you understand the patter that follows. (P.S. I'm just screwing with you on the exploding battery causing bug thing. It's perfectly safe. The rest is serious though.) Edit: Oh and you have to copy it over as root to be able to override the existing file you changed with the backup, unless you changed write permissions on the file already. But I'm guessing you knew that since you had to be able to become root to change the hildon.menu file (But it's possible you did it through filebox with root access or something, so you may not have known).
cp [path and name of your backup of the original hildon.menu] [the path and name of the hildon menu file you messed up]