Pulled the following from the CatoBase ReadMe file:
"To install CatoBase, first download the full install version (5.4.0), run the setup program and follow the prompts. This will install the program to a folder of your choice, C:\Program Files\CatoBase by default. It will also install Microsoft Data Access Components (MDAC) version 2.7, if necessary. For more information on MDAC, visit
www.microsoft.com. Then, download the most recent update (currently 6.1.4) and unzip its contents to the install folder, overwriting the existing files."
Been a while since I did it, but I think it is pretty straightforward doing the install with the 5.4, and then you just copy over the older versions with the latest V6 files (6.1.4 right now). Of course, you need those files from somewhere with the web sire not up currently.