MrBean35000vr uploads CTGP-R content as well as other modding work to his YouTube Channel.
A video showing all 216 custom tracks in CTGP-R.
A video introducing Countdown Mode.
A video showing the change characters between races feature.
A video showing tracks with engine speed modification.
A video introducing the Cup/Course organiser.
More information about CTGP-R and Mario Kart Wii modding, including information about how to make your own custom tracks can be found at the Custom Mario Kart Wiiki. The wiki also contains information about all of the tracks in CTGP-R and media relating to all of them.