The first column is the name of the AU plugin, the second is the zero-based index of the AU in that file,
  the third is the AU number/name.

For 1+2+4:
CERT3_3_Weights 0 1
CERT3_3_Weights 1 2
CERT3_3_Weights 2 4
CERT3_3_Weights 11 1+2+4

For 1-2:
CERT3_3_Weights 0 1
CERT3_3_Weights 1 2
CERT3_3_Weights 12 1-2