So the new drive has windows on it already? how did you install it on there?
anyhoo, to install windows on the new one, set your bios to boot from cd,
install the hdd in the system its going into,
power up and immediately get the windows cd in the drive, you may need to reboot again if it misses the boot though,
then just follow the instructions to install windows and partitioning/formatting is part of that process, I'll look back later see how you get on