Music Concrete

I decided to write about this particular assignment because it is still giving me some trouble. I have been trying to work on it for some time now, but apparently I am doing something wrong!! I have been looking for free sound effects for some time now, and finally Kate told me to sign up for with this website and they will send you free sounds.  Well just my luck I did sign up and I did not get my free sounds in my e-mail, after searching through the website it says it can be in your spam mail....whoops I always delete that first thing.  So no free sounds ( I think I am going to sign up again with a different e-mail address)  I also think a part of my problem is I am working with a brand new computer a mac.... which I have never worked with before. I love my mac but I am still trying to figure out how to use it!!  So...if anyone has any suggestions/comments please feel free!!! Thanks!! :)