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I got the following to work for enabling middle button scrolling in Mageia 2. [I used System Settings - Configure Your Desktop > Input Devices > Touchpad; to disable the TrackPad on my ThinkPad, as I don't use that.]

Create the following file as root:

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/etc/X11/xorg.conf.d/20-thinkpad-trackpoint.conf

Put the following content in that file:

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Section "InputClass"
   Identifier   "Trackpoint Wheel Emulation"
   MatchProduct   "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device|Composite TouchPad / TrackPoint"
   MatchDevicePath   "/dev/input/event*"
   Option      "EmulateWheel"      "true"
   Option      "EmulateWheelButton"   "2"
   Option      "Emulate3Buttons"   "false"
   Option      "XAxisMapping"      "6 7"
   Option      "YAxisMapping"      "4 5"
EndSection

Sherlock19 it is often quicker to just use the command line and copypaste a few commands. Also sometimes it's the only way to run complicated commands. So it's worth it to learn how to enter commands as root. Try this:

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$ su -
Password:
# cat >/etc/X11/xorg.conf.d/20-thinkpad-trackpoint.conf
    Section "InputClass"
       Identifier   "Trackpoint Wheel Emulation"
       MatchProduct   "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device|Composite TouchPad / TrackPoint"
       MatchDevicePath   "/dev/input/event*"
       Option      "EmulateWheel"      "true"
       Option      "EmulateWheelButton"   "2"
       Option      "Emulate3Buttons"   "false"
       Option      "XAxisMapping"      "6 7"
       Option      "YAxisMapping"      "4 5"
    EndSection
# exit
logout
$


This is a copypaste of what I just typed on my terminal. I only edited out my name in the prompt, leaving only the $ to signify that I am running as a regular user and # when I've become root.
In this example copypaste the su - into a terminal and give the root password.
Then copypaste the cat ... line.
Then copypaste the 10 lines beginning with Section and ending with EndSection.
Now you have to hit Control-D by itself at the beginning of the line after EndSection, noting that it does not show on the terminal, and press enter. This will get you out of the cat > block and back to the root prompt.
Finally type exit, or Control-D again to get back to the normal user prompt. Or you can directly close the terminal window.
These are only a couple of simple things to learn which are very useful and you can take with you for the rest of your life...