Array Selection

[Inneed]

Hi!

I've been call to a company who was a G5 ML 350.

They have a SAS RAID 5 width windows 2003 SBS.
I've been asked to configure a 2º Array.
I install the physical disk, and configure it as an RAID 0, width the HP Array Configuration Utility.

My Problem is:
-The new Array is automatic set as SAS ARRAY A.
-The original Array, (RAID 5), witch contains the operation system, is automatic set as SAS ARRAY B.

Now when the system boots it trys to boot from Array A (witch does not as the OP system), and it fail's to boot.

My Question is:
How can i set array B, to be the default boot array?

I've search to bios and the array utilities, and could not find where to change it.
this may seems a very stupid question, but this is my first HP server.

thanks 4 all the help.

Inneed, PT

[Inneed]

BAckup System,and,
I´ve reset all raid configs and create a new one.restore system