EXS 24 Logic Sampler Users Group

I just bought Logic 5.2 with EXS24 Instrument Editor from ebay 

Imediately update to 5.51 which is the final PC edition of Logic and also a great one. The EXS mrk II is part of that package. 
You have to load an EXS instance in an instrument, select the instrument in arrange and go into the instrument in the mixer window by double clicking it. Select your preset and you should be able to hear it when you press your keyboard. If you need to edit further go into the editor from the EXS.