BI Admin Tool - Setting connection pool via shell script - Is it possible?

Hi,
Here's the problem I am trying to solve.
I am using a J2EE application that uses OBIEE for reporting.
The *.rpd file is installed at a particular location when our J2EE product is installed.
I then copy the *.rpd file to the BI home on a different server using a shell script.
The shell script that deploys the *.rpd file does the following:
1. Shuts down BI processes that are running
2. Deletes the old *.rpd file
3. Copies the new *.rpd file
4. Starts all BI processes
I am happy with the way we have automated this process, but would like to take it one step further.
The *.rpd file does not have the connection pool hard-coded in it. And we want to keep it that way.
What we would like to do is - pass the connection pool parameters to the shell script (that is used for *.rpd's deployment) and have it automatically update the *.rpd file. Is it possible to do this at all? How do we go about accomplishing this?
Or in other words - Is there a way to update the connection pools WITHOUT hard-coding it in the *.rpd file or WITHOUT using the BI Administration Tool.
Currently, we manually update the connection pools in the Physical Layer using the Oracle BI Administration Tool.
The version of BI Administration Tool being used is 10.1.3.3.1 installed on a Microsoft Windows XP Professional SP2 machine. The BI Server itself is running on an Oracle Enterprise Linux 4.0 box.
Do let me know if you need more information that would help answer this question.
Thank you.

Thank you - fiston and Gagan.
I am going with fiston's solution - since it is easier to implement. I am on the QA team and the automated deployment is to lessen QA's deployment time.
While one of our developer's said that she prefer's Gagan's solution - it would be over-kill to make changes to the application's schema for the said purpose.
I will further make another post as to whether or not the automated deployment worked for us.

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Figured it out.
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BI Admin Tool - Setting connection pool via shell script - Is it possible?

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