1 Win XP 2 HArd Drives

I have one copy of Windows XP Home Edition. I have recently purchased a new 160 GB Hard Drive. I have an existing 30 GB Hard Drive in my system. I want to make the 30 GB a slave and the 160 GB Primary. My Question is this:

Can I install the same copy of Windows XP HE on both Hard Drives? I am not familiar with the licensing rights or whatever. Any thoughts?