help Logic 9

i am new with logic and mac i work with cubase until now
and i have a few problems:
1. how to do changes like reverse on semples but just to 1 of the samples not for all the semples on the track
2.i have a virus keyboard and in cubase i can use all the 16 channels of the virus how can i do it with logic?
3.when i do a fade out to samples and i close it a bit i get a click sound how can i change the curve of the fade out to stop the click?

thanks alot ^_^