Kind of odd to pay a lot of money for a package without knowing what to use it for!?
It is good for storing your own games, making annotations and using a chess engine to help advise where you went wrong (after you did your own analysis first)
If you have a package that came with a large database you can also look through to see other games played in similar positions.
I suggest you look at these links:
Here's a bunch of tutorials for using chessbase and Fritz (some features
only available on latest versions but most features available on all
versions): http://www.chessbase.com/download/index.asp
And here's some more:
http://www.chesscafe.com/archives/archives.htm#ChessBase%20Cafe
chess engine
If you have an old version of Fritz, you can - totally free of charge - use
a more modern and stronger chess engine in the program. The free version of Rybka (version 2) is the second or 3rd strongest chess engine (with an estimated elo of around 3000) after the new commercial version of Rybka - version 3 (estimated elo of around 3100) and can be download from the Rybka
website here (don't worry about the openings book):
http://www.rybkachess.com/index.php?auswahl=Demo+version
Instructions on how to install in Fritz are here:
http://www.rybkachess.com/index.php?auswahl=In+Fritz
And in chessbase, here:
http://www.rybkachess.com/index.php?auswahl=In+Chessbase
As you know, it is NOT permitted to use these engines to help you during correspondence games on RHP. They are useful to assist your own analaysis of positions after the game