Apple Logic Pro /LogicExpress Discussion

I do not have a Macbook with intel chips.

But I do have both an EMI, and a MBox (1).  

I have problems making Pro Tools and Logic staying operational in the same computer.  
One or the other gets into some QUIRKY stuff!  Playing samples at half speed, eventhough 
sample rates are set correctly everywhere.  PT won't even boot up now, with "error 6003" 
messages.  I'm afraid to fix it because I NEED Logic to be working, and would LIKE PT to be 
available also.  

Thought my experience would be interersting for you to learn.

Pete