I was stuck with MS-DOS 5.0 as a child, and was mildly envious of 6.x's MultiConfig that I read about in magazines; it seemed so much better than using boot floppies for nonstandard configurations. So I rigged autoexec.bat to present a menu of various configs and rename the related config.sys files so that the one I chose was used after autoexec.bat ran. Worked quite well; the only minor downside I encountered was having to reboot again when choosing a different config than the one config.sys currently held.