Installing Ubuntu 13.04 with orca?

[Petra Ritter]

Hello,

Is it possible to install Ubuntu with Orca?
The first time I tray it I stared Orca by pressing  CTRL+S after the 
first scrren of the installer was displayed.
Orca was started without problems but it says always Installer not 
accessible or something like this.

How I start Orca so that It works in the Installer or how I can install 
Ubuntu 13.04?

Best regards

Petra