If you want to have your feature selections as radio buttons, you need to set the following in your prodfeatures record.
FeatureType = Radio
FeatureCaption should be the same for all items with same featurenum (for example: color)
FeatureName should be the individual different buttons (for example: grey, orange, striped, white)
Featureprice is an optional price associated with feature (for example: 1, 0, 2, 0)
FeatureMultimust be set to No.