Lenovo ThinkPad X41 Tablet (1869-CSU)

I have a ThinkPad X41 Tablet (1869-CSU).  Someone installed XP Pro on it and I cant seem to find a copy of windows xp tablet pc edition any were.  The pen does work on the tablet.  But it says I have XP Pro.  How do I know what I really have and How do I get all the buttons on the screen to work?  I think im missing alot of software.

Im being told that xp pro has alot of missing parts for tablet.

Q3: What does Windows XP Tablet PC Edition include that Microsoft Windows XP Professional does not?

A3: Windows XP Tablet PC Edition includes everything that is available in Windows XP Professional, and the following additional features:

• Pen Input: Tablet PCs include digital pens that you use to control the computer and to write text in your own handwriting.
• Tablet PC Input Panel: Input Panel is an on-screen keyboard and writing pad. With Input Panel, you can type text without your standard keyboard.
• Microsoft Windows Journal: Windows Journal turns your Tablet PC into a writing pad.
• Microsoft Sticky Notes: You can use Sticky Notes to create and manage short handwritten or voice notes in the same manner that you would keep a stack of paper sticky notes.
• Handwriting Recognition and Conversion: You can write in your own handwriting, and then convert it to typed text.
• Speech Recognition: Tablet PCs have built-in speech-recognition capabilities.
• Document Annotation: You can annotate imported documents with a Tablet PC pen.
• Reading: Your Tablet PC uses Microsoft ClearType technology and a high-resolution display.
• Screen Rotation: You can quickly rotate your screen for landscape or portrait viewing.
•  Gestures: You can use your Tablet PC pen to make "gestures." "Gestures" are movements with the pen that complete common tasks

I guess I need to find a copy of xp tablet pc edition.  Because I would like all the funtions to work.