You must install to different directories on the hard drive. Ensure when installing new versions that you don't delete previous versions.
You need to add explicit path and file names of the appropriate versions of
access to all the shortcuts. For example "C:\Program Files\Microsoft Office
97\Office\msaccess.exe". Including the quotes if you have any spaces in the path
name which is very likely.
There are some programs out there which will automatically start the appropriate
version of Access.
One of those is ACCVER -
Allows you to work with multiple versions of MS Access databases. Detects the
version of Access used to create your MDB, MDE or MDA files and either reports
the version number or starts the appropriate version of MS Access.
Q241141 - ACC2000: How to Install Access 97 & Access 2000 on Same Computer