You mentioned +R/+RW only, hence the specificity of reply. I thought that's what you were using :rolleyes:.
Nevertheless, the advice in the second paragraph is true for both '+' and '-' formats (once you have the recording in the DVD-Video specification, the adjustments are format independent). Copy Audio_TS and Video_TS folders to HDD and edit the IFO file in Video_TS.
Note that this will only work if the Sony has made a proper anamorphic recording of the transmission (which it should), and thus it's capable of being played back either as 4:3 or 16:9. What happens on your PC monitor if you change the A/R of the 'squashed' image to 16:9. Does it then look OK?