EXS 24 Logic Sampler Users Group

Yes. I have LAP 5.5 for windows and im pretty much a beginner in all 
this. My question is... Is there a way to speed up a tempo on a wave 
sample imported into Logic. I have a song with exs instruments and 
set to a specific tempo and I wish to import a wave to match that 
tempo.. 
Also.. Question #2
Every once in a while I go to import or open a file Logic completely 
cuts off and what ever i had gets lost. I dont understand the 
behaviour..

Any help would be much appreciated.. Thank you.