Gamespot's Maxwell McGee and Sega's Patrick Riley went over the various features in training mode. This includes the tutorial, record function, frame data, and command/combo training.
Near the end of the video, they also covered the customization mode. This would be the first video in English to show off the customization mode in detail. So go check out the youtube video!
Once again, thanks to VFDC for finding this one. Seriously, if you don't have a VFDC account and you are a regular here you don't know what you're missing.
PS: The VF4 Evo menu/customization theme is back!