This disk contains everything you will need to run the version 2.2
front end with your version 2.1 Mathematica kernel. Simply copy the
file "fe22.exe" to the directory that contains your Mathematica V2.1
files and run it (by double clicking it in the Windows File Manager,
or typing "fe22.exe" at a DOS prompt).  Once the files are extracted 
you can delete "fe22.exe".

Kernel Help and Front End Help are now integrated into a single helpfile.
Move "math.hlp" to your Windows directory to get online help from the 
front end.

With the V2.2 Front End, Mathematica variable $Path is set in init.m, 
which is located in the directory that contains your Mathematica V2.1 files
(for example, C:\wnmath21).  You must insert the following line to your
init.m file:

$Path={".", "C:\\wnmath21\\packages", "C:\\wnmath21\\packages\\preload"};

Make the necessary changes to reflect the location of Mathematica on
your system.

