How do I install windows 95 software into windows 98?

Internet Explorer 4.0 came with an optional shell update known as Windows Desktop Update that gave Windows 95 (and NT 4.0) a user interface that would become the graphical user interface of Windows 98. Only the 4.x series of the browser contained the shell update, so those that wanted the new shell had to install IE4 with the desktop update before installing a newer version of Internet Explorer.