If you have the disks, there should be a separate one with all the old software and firmware kits. I just went through this recently and was relieved to find all this on DVD to avoid having to download them all. You will need all the old versions of RSLogix in order to support those firmware revisions, so you will probably want to install those too.
They all installed fine on my Win7 64 bit laptop except for the oldest one (13 I think) which would require a 32 bit system or vm. It did not take much time to select all of them (I unchecked the sample files, I can get those elsewhere if needed), and let the install process run for all of them. There may be a prompt for installation of .NET framework 1.1, and you must answer yes, otherwise, the install will abort and you will have to make your selections all over again.
Unless you are strapped for disk space, there is no performance hit if you have them all. Then, when you open a file from the start page in Studio5k or double click a file, the correct version will automatically start.