Installing second HD on Win 7 Home Premium 64-bit?

pw2much

TS Booster
I have a Sata 1TB hard drive that I want to install in my system because the ide hard drive that's in it only has 120gbs of space and is running out of space. Can someone please help me with the formatting of this? I am not familar with this system to that aspect to formatting the new HD.the hd is already installed but I having trouble determining what to do. I want to use it as an extra drive without having the OS on it! What are the steps to get it recognized in my computer as a drive? This is my second computer Asus-M4A785TD-V EVO with 6GB Kingston HyperX 1600 ram,Phenom II X4 925 processor,120GB WD HD (IDE),LiteOn iHAS324 multi-drive,LiteOn iHBS112 Bluray Burner, Corsair 650W PSU.OS-Win.7HP 64bit