There are several ways about this, try them one by one and see which works for you. Be aware that the first issue to support 2000/ME was AUG2000 (Maybe July) , anything earlier will not work on these OS's.
Also, if you have any early version of the Doc CD installed(pre-Aug2000), you must uninstall it (and delete the data directory) before installing the new issue.
Method #1
Install the CD as you would normally do. Then copy the documentation CD to
your hard disk. Edit the search.ini file and change the following two lines
to point to wherever you copied the documentation CD.
Example:
InitialURL=/c:/program files/cisco/cd_data/home/home.htm
SourceDrive=c:/program files/cisco/cd_data/
Method#2
To get the Cisco documentation to work under Windows 2000: Run regedit
Locate HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/IE4/Setup/Path
Change the value from "%programfiles%\Internet Explorer" to the location
where IE is installed on your system, for example "C:\Program
Files\Internet
Explorer".
A third method straight from the horses mouth.
Hope this helps.