Installing my PostgreSQL client

Hello,
We use the PostgreSQL ODBC to track our
released software. We have several Windows (XP, 2000)
desktops and laptops with the PostgreSQL clients. I have
tried, several times, to install the client on my Windows XP
laptop without success.
The process I have used is the same one that works
for our other machines. We download a client from the website
(psqlodbc-07_03_0200.zip, psqlodbc-08_01_0200.zip, etc.)
and unzip it.
I then double-click the Microsoft Installer. It all executes
without error messages.
I then go to the Control Panel\Administrative Tools
menu and click "Data Sources (ODBC)". I scan the list of available
items but DO NOT SEE the items that we have selected on the other
client machines. What I see, at the bottom of the list, on the other
machines is -

PostgreSQL
PostgreSQL ANSI
PostgreSQL Unicode

(We would select only the PostgreSQL item, correct?)

Am I downloading the correct ZIP file?
Any ideas?

Regards,
Richard Hardgrave
Emerson Network Power