how to add all disk units to system pool as400 v5r4

[Sergio]

Im reinstalling V5R4 in my System I, this is the very 1st time that I
do it.

I know that after base disk has been loaded I need to add all disk
units to system pool (in my case)....
Then I need to install the operating system using the disks
and then load all the licensed programs

I already did the base disk step... and now I'm on this screen

------------------------------------------
IPL or Install the System
System:
S1xxxxx
Select one of the
following:

1. Perform an
IPL
2. Install the operating
system
3. Use Dedicated Service Tools
(DST)
4. Perform automatic installation of the operating
system
5. Save Licensed Internal Code
------------------------------------------

How Can I get this other screen in order to choose opt 3?

------------------------------------------
Add All Disk Units to the
System

System: XXXX
Select one of the following:
1. Keep the current disk configuration
2. Perform disk configuration using DST
3. Add all disk units to the system auxiliary storage pool
4. Add all disk units to the system ASP and balance data
------------------------------------------