Hi Ken
Out of all the players, Kontakt 4 will be best as it is the most flexible for what you want to do.

What equipment are you using it with? As the CPU power, RAM memory and HDD will play a big part in what you will and will not be able to achieve with it.

There an excellent tutorial here to understand the basics:
http://www.groove3.com/str/popup_vplayer.php?id=1921&productid=16259

Once you have viewed and taken in the above, post again with the above details and it will then be easier for further instructions to be tailored for your specific use.

Regards

Bill