Changing tempo of Wav loops?

Hi
 
I've done searches and can't find a specific answer.
 
Here's the situation. I have a number of wav loops (drums mainly).
 
The question is can I adjust the tempo of the wav loops to match the tempo of a project. ie: The wav loop is 150, but the project is 130. I want the loop to match the tempo of the project?
 
Also, if it's an audio loop of an instrument ie: guitar-piano etc. WIll it alter the pitch, if so is there a way to correct that?
Is this an audio snap process possibly ? If so, could you detail the process.
 
If not, just call me a noob and I'll walk away. ;)
 
Thanks in advance for any response.
 
~M~