Front Half Shaft /CV Joint Questions

["mikesoft" <mikesoft@europa1.conwaycorp.net>]

I got some replies to my last question about the clunk
when turning right. I will be replying to those individuals
directly. The big accordion like boot on the half shaft 
closer to the wheel is torn and is what I believe contains 
the CV joint. I did some shopping around for CV joint 
kits rather than have to replace the entire half shaft due
to a limited budget. I emailed Mark of German A.P. 
and this is what he had to say :

>I have the inner joint kits for $95.00 and the outer kits for $155.00.
>These ane new original German Lobro joint kits including joint,
>boot, grease, clamps and other hardware.

I am confused as to what part I would need for the 
CV joint. Would it be the outer, inner or both joint kits that I 
would require. What determines which to go for. Thanks 

Mike