Install Oracle 9iAS Infrastructure

Hi ,

Can someone give some info about installation of
"Oracle 9iAS Infrastructure".

I installed Oracle9iAS successfully. But nowhere any option
was given for installing Infrastructure except for configuring
SSO server in one place. I need to use SSO and OID. For this
I read that Oracle Infrastructure should be installed on some
host. But don't know how to do that .

Can someone help me in this.

Thanks
Raesh