Installing old version of Photoshop with Windows 8.1

Hi!
I need your professional feedback about my plan. I am using Windows 8 now. I am planning to install older versions of Adobe Photoshop. Can you give me information about this? Is it possible with my platform? Can you give me instructions on how to do this with Windows 8? Can you tell me what the required software are and plugins that I need to download so I can make it work? What are the possible problems that I might face if I will do this?
Thank you!
