Redirecting console output to ILOM during installation

Hi,
I need to install solaris remotely via the ILOM port on a x4170 box, and I have downloaded the Solaris 11 for x86 - text install image and burned it on a DVD.
When I boot the box, it's showing the boot_archive loading percentage on the SP console, but when it's done and start the interactive install menu, it's not displayed on the SP console, only on the VGA screen.

In solaris I would solve this by using the eeprom console command, but I don't know how to set the redirection during installation.
Do I need to somehow set it up in the BIOS?

Any help is much appreciated