What do I have to know about them? Is it good to install them all of them all the time? They fix problems without causing new problems? Give me the url where I can download them. How can I install them? Just run them? Are they standalone self-installed or is it better to purchase someway a whole copy of the new version? Does an update means that the osx gets a new prefix? 10.4.8, 10.4.9 etc. Or they are standalone patches?