Don't really know about hamsters and ferrets(except that both are animals), but this:
I did look, and the file isn't there. But when I try to simply copy the ferret script over it still doesn't recognize it.
You copy it to where? Is it in same folder with the program you're trying yo execute? If so, have you made sure it has right permission to be executed? Maybe you could add it to your "path" and test if it works then.
You are saying script, but if it happends to be binary file are you sure it ain't architecture issue? If you downloaded ready build binary somewhere is it right kind for your system?
Most likely wisest thing to do would be to leave these tools alone for now and learn some basics of Linux. Even if your issues would not have anything to do with stuff I mentioned, the fact you could not provide more info in your starting post gives quit strong impression of you lacking knowledge in basic things. Just my opinion/guess.