First things first the new hdd should have been formatted with software like dban or Western Digital Data Lifeguard writing zero's to it.
dban takes depending 11hrs for 500 gig, 4 hrs for a little old 80 gig.
DBAN Download | Darik's Boot And Nuke
Western Digital Data Lifeguard takes from 2 minutes for quick write zero's & full could take a bit.
|MG| Western Digital Data Lifeguard Tools 1.13 Download
wddlt is an install version, dban can be ran from without an operating system, you just boot up to the disk.
After words, boot into your gparted, right click on unallocated partition, select new, ntfs, a prompt will pop up asking to make it a msdos disk, go ahead and continue with msdos disk, after that you may make your two partitions, First one ntfs, second one ext3 or 4, the third one your swap, or make first one primary ntfs and second one extended with w/e partitions inside the extended for say like partition 2 under extended would be / "root" second would be /home "home" in ext4 or 3 and third would be swap.
Install windows 7 first, after that has been finished, install your unix
. don't forget the grub menu
.