Can I Add Windows Ultimate to XP on a Logical Drive

Hi All,

I will try to keep this simple. I currently have Win XP 32 bit on my C drive which is logical (don't know why it is). And I want to add Windows Ultimate, but I don't know where to put it. Here is a screenshot of my disk management. What would be the easiest installation with minimal dangers. Thanks so much for any help (I'm kind of a n00b, so be patient with me please).

http://img19.imageshack.us/img19/1079/greenshot20121029...

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Operating System
Microsoft Windows XP Pro 32 bit
Computer Model
N/A
CPU
Intel Core i3-2120 CPU @ 3.30Hz
Motherboard
Gigabyte GA-Z68A-D3-B3
Graphics Card
Windforce
Memory
16 GB G.Skill Ripjaws
Storage Devices
3 Hard Drives
DVD/CD Rom
Sound Card
NVIDIA High Definition Audio
Monitor
Dell Plug and Play
Power Supply
Thermaltake
Internet Connection
N/A