Re: How to use a different audio i...
Make sure you place the sampler instrument file (.exs) in the location above and place it's samples in a folder with it.
If you had Logic and EXS24 open while doing this then click on the instrument selector area and choose 'Refresh Menu'.
I couldn't tell you whether the kits you got will be one shots or fully multi-sampled across many velocity layers... All depends on who did the sampling and created the sampler instruments ;-)
Hope that helps!
btw, you may be interested in the EXS24 tutorial? It is very useful and shows some really nifty ways to create and modify Sampler Instruments:
Of course, ask away here too and I'll help whenever possible :)