I got my Macbook Pro today in the mail and used my 500GB Western Digital hard drive as an external drive. Mainly for only 2 reasons: 1. To grab all the files I need/don't want to lose (photos, music, documents, etc.) 2. Then completely erase the 500GB HD so I can then install it into the new Macbook Pro and install Leopard. (I'll then externally connect the 160GB HD that came w/ my Macbook Pro and add the files I've already copied into that 160GB HD into the 500GB Leopard installed HD in the new Macbook Pro) So, currently my 500GB HD is connected to my Macbook pro and I want to completely erase everything so I'll then have a completely clean hard drive, to then install into the Macbook Pro, add the installation discs and install Leopard into the 500GB HD. But disk utility here on this MAcbook PRo is not allowing me to do this. At least, I've never done this before so can't be sure... I don't know what to do, any help is really appreciated. As a side note, how long would 35-zero out erasing feature take? 150GB is used on that 500GB HD, if it matters.