Brief summary - I got my first Mac in February. I've learned how to use a great deal of it since then, but obviously i've never needed to install the operating system on it or do anything past simply use OSX before, so i'm flying blind a bit here. I have my legally purchased £25 Snow Leopard DVD and I want to do a full clean install. From what i've read I need to go to "disk utilities" and erase the drive, and then proceed with the Snow Leopard installation? Assuming i'm right (BIG "if" on that one!) i'm guessing this can't be done from within OSX as after the erase OSX will no longer be there? So i'm guessing I need to insert the Snow Leopard DVD and restart? Will the DVD boot automatically or will I need to hold down the option key (The alt key iirc?)? Then, will there be a "disk utilities" option somewhere so I can erase the drive? As you can tell, this is basic stuff here which is automatic to you guys but may as well be Russian to me, so any and all help very much appreciated!