That indicates you need to install rootsh prior to following those instructions. You'll find rootsh available to install from within the application manager on your N900.

I did a reflash, and i have nokia messaging again. Mobile maps 10 still doesent work, I dont know why, but mobile maps 9 works¡. I will try with my car later. Thanks for all my friend

For the installation of Mobile Maps 10 you need to remove the following folders in /home/user/MyDocs (after having uninstalled the older version):

Maps
Drive
Res

If unsure, you might backup them first or simply rename them to Maps1, Drive1, Res1.
Then try installing Mobile Maps 10 again and it should work.

thank you, I know.

The problem with Moile Maps 10 is that, alltough the installation is succesfull, then i try to open it, ti tries to open for a while (a couple of seconds) and the it shuts down inmediately. I tried to do it in many different ways, i tried with sygic support and they surrendered, I have the activation key,but I just cannot open the application, however I can install an open Mobile Maps 9, and it is activated and it works Why?, humm¡¡ Who knows?. Thanks for your help anyway

With the reflash I got Nokia messaging back and now is working perfectly. But I had to do the reflash with the "flasher program", not just reinstalling the software through Ovi, That did not work at all and I lost everyghing. Thanks for your help