[frogboy2727]

I'd like to install a brand new 250GB (9mm) HD, from a brand new HP lappy, into my newly purchased 2.0, 160GB HD Macbook. The 250GB HD still has the HP/Vista image on it. In order to install this new HD, would I have to format it first?? Or, could I install it, as is, then run the OS X CD, while holding down the C key?? Or, do I need to do something else??

[Big Mac]

The latter. When you boot into the installer, you can select Disk Utility from the Tools menu and format the disk.

[frogboy2727]

Thanks for the information, BM. Much appreciated.

[Ted L. Nancy]

And while you're at it, I recommend a zero-out data.