hi there, my brother just sold his ibook g3 on ebay or it'll be sold within 24hrs i believe. He wants me to format it using the disks it came with. when i do a fresh install of OS X, will that be enough to make sure no one can recover any data from the harddrive or should i write 000000's or something like that before i do the fresh install? the data isnt that important i believe cause my brother just used it for university and in his lab. But i just want to make sure that i wipe everything clean. Thanks.