to format it for Mac only use you would just format it as Mac OS X Extended (Journaled) using the Disk Utility app on your Mac.
You will need either an enclosure, USB or Firewire, to put the old Windows drive in or a SATA dock (assuming the drive is a SATA drive)
P
If so, Can i read and write ? And how to format it from the mac to use it on a mac also !

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic