Windows 95/98
If you're using Windows 95 or 98 you can download a copy of the old Prairienet Training Manual for use. We no longer formally support this manual, however.
GCF LearnFree.org also offers a rather good free tutorial for Windows 98.
Windows 2000
You're probably okay following the Windows XP guides. There will be some minor but insignificant differences.
Windows ME
Sorry, we don't have any material for this operating system. You can try the Windows 98 guide, it's pretty similar.