I remember that installing an older version of IE on Windows 95 enabled some features like the Quick Launch bar in the task bar.
Previously, I believed that this was a feature exclusive to the newer Windows 98 but that IE installation backported a lot of the visible Windows 98 changes into the Windows 95 Explorer.
That was Internet Explorer 4. It was however an optional part of the installation and if you installed IE5 without installing IE4 before, you couldn't get it.
