I just uploaded a video to YouTube demonstrating how to install Microsoft Bob on Windows Vista. While I used Vista for the tutorial, it runs a lot smoother on older operating systems. You can download the Microsoft Bob installation files below.
Supported Operating Systems: Windows Vista, XP, 2000, 98, 95, NT, 3.1x
1) Download the .zip file
2) Extract the contents of the file
3) Follow the process shown in my video
Disclaimer: I did not create nor do I own the rights to this software. I don't at all remember where I got this copy from as I downloaded it back in 2011.