If you want to have your feature selections as checkboxes, you need to set the following in your prodfeatures record.
FeatureType=Checkbox
FeatureCaption should be the same for all items with same featurenum (for example: color)
FeatureName should be the individual different buttons (for example: red, green, blue)
Featurepriceis an optional price associated with feature (for example: 1,.5,0)
FeatureMultimust be set to Yes to allow multiple selections.