we installed Openoffice.org 2.3 and i am tryingt to run the script by importing UNO and it is throwing up an error saying there is no module called pyuno.

I am not able to find pyuno.py file in the location where i have installed open office
Please assist.

On Windows you are looking for is a DLL called pyuno.dll. On my installation it is in:
C:\Program Files\OpenOffice.org 2.4\program\

You may have to copy that DLL into a folder mentioned in PYTHONPATH, so Python can find it, or you can start your program with:

import sys
# appends to PYTHONPATH  the location of pyuno.dll
sys.path.append(r"C:\Program Files\OpenOffice.org 2.4\program")