The HDR-2000T stores and displays the Radio recordings in a manner identical to the HDR-FOX.The HDR-FOX records radio services as if they were video - the resulting recording file is a .TS as usual, and the recording is located in the video folders accessed from the Media button.
If the HDR-2000T is doing something different, this is AFAIK previously unreported.
That won't work even if the Radio programmes contain music. Like the HDR-FOX selecting 'Music' will just hide the Video and Radio recordings.Try going into Media and selecting "Music" as the media type (yellow button).