This file sets the number of skill points available at each level for each class (the column). It does not set the intelligence bonus.
In IWD2 we have:

2DA V1.0
0
   	  BBN     BRD	CLR	  DRD     FTR	MNK	  PAL     RGR	ROG	  SOR     WIZ
1       2       2       1       2       1       2       1       2       4       1       1