if xp ctl alt del and hit new task
type explorer.exe and browse to your ls folder
click revert to default theme.

if 9x boot into dos by f8 and run edit at command prompt
go to C:\windows\system.ini and edit line
explorer=C:\litestep\litestep.exe to
explorer=explorer.exe
reboot and you should be good to go...
Its been been a while since my 9x days hope this helps.
These threads popup all the time and many hate answering over and over.