Mike, as JoAnn stated, if the software came as part of the original computer
(says OEM or for distribution on a new PC only on the CDs although most OEMs
don't include Access IMHO) you would be in violation of the EULA if you
installed it.
If you are not going to be in violation of the EULA and want to try to
install it a few pointers. When the software setup starts you will want to
do a Custom installation. You will be asked to tell the computer where you
want to install it. Make sure that the preselected location is NOT the same
folder name as the 2003 version. I have on various computers installed
different combinations of Office 97, 2000, XP & 2003 S&T and Pro versions
all at the same time but to different folders. You can change the name of
the location easily by either adding or changing characters in the displayed
file structure.
If this installation fails, you may need to temporarily uninstall the 2003
version, install Access from the 2000 version and then reinstall the 2003
version. I have never had to do this but strange things may happen to
require it.
Good luck and happy computing!