Installation method to use to replicate BWP/BIP Backend

Good Day,

I will appreciate help in determining the installation media to use to replicate/build a BWP/BIP test server from scratch using the homogeneous system/copy method. There are Java installation files existing at the OS level and cannot determine how they were installed.

Scenario:

Backend facts:

    OS: RHEL Linux 5.5 (Tikanga)

    Oracle: 10g

    At the Linux OS Level these directories exist

           a.      /usr/sap/BWP

           b.      /usr/sap/BIP      

                    under BIP these directories exist

                          SYS

                          SCS02

                          JC01

                          config

                          oldkernel 

    Software Components when logged on via SAP GUI ----

           SAP_BASIS

           SAP_ABA

           PI_BASIS

           ST-PI

           SAP_BS_FND

           SAP_BW

           GRCPINW

           FINBASIS

           ANAXSA

           BI_CONT

           OPMFND

           SEM-BW

           ST-A/PI

Frontend facts

    SAP GUI 7.30

    Business Explorer  - suggesting there is a JAVA installation

    When users invoke Business Explorer it re-links to the SAP GUI logon screen which means there is ONE central user repository.

Uncertain (not sure):

     There is a Java installation which I cannot determine how it was installed and will like to confirm how to replicate.

If there is any further information required to resolve this issue, I can provide.

Thanks in advance..

Vinood.