This was another arrogant booboo by Microsoft. Transparent backward compatibility should be a given for at least three iterations of an operating system. I don't know the answer to your question, but I hope someone does, because I have a friend who recently bought a 64-bit and is having exactly the same problem. You are not alone. Is it any wonder that MS is reportedly the most hated company in the world?

I know somebody is probably going to come on and declare that the problem is the developers' fault. Developers use the system as MS presents it. It is MS's responsibility to not render users' software obsolete.

HP also does not provide hard copy of the documentation with some computers. I recently discovered the User's Manual in the program listing of the Start menu.

It's an insurance agency management software called "Doris". The program itself works fine, but the import and export features (which are probably the most important features) are what seem to be having problems in a 64-bit environment.

Doris Agency Management Software

Thanks everyone, I will report back after trying a few of the recommendations above. If you have anything else to add - please do. I will be checking this periodically throughout the day.

In case anyone was wondering the outcome of this post, I will share what I did.

I went to Amazon.com (Newegg had the same price) and bought an OEM Computer Builder Version of Microsoft Windows Vista Business 32-bit. After backing up what I needed, I put the CD in and restarted the computer. Then, simply went through the installation process after booting to the CD.

During the installation, just format the existing partition(s) and then pick the partition you want to install Vista Business 32-bit on.

On the HP Entertainment PC I was working with, I had to download almost all the drivers from HP.com because they don't offer system CD's anymore (they rely on the "recovery" partition, which I just so happen to remove). Oops. ;D
The first driver to install should always be the Ethernet (NIC) drivers, because then you can connect to the internet on that computer and download the rest. I recommend downloading the video card drivers next to get your screen resolutions back to normal.

After that, just keep going down the driver list until you have everything. Now you are successfully downgraded to Windows Vista Business 32-bit.

Good luck!