I recieved a G4 from my sister, she used this mac for 4 years without formatting it, the only thing she done is accidently partition the hard drive into 3 hard drives what makes the hard drive which the OS X sit on to be low on space. what i want is to format this mac so it will run faster and unite all the partitions, can i do it alone? is it hard to format on mac? can someone plz give me a guide? thanks alot, adam.