I couldn't get the script to work but on magic weapons you can add bonuses with a field.
Code:
field[wDamBonus].value += 1
field[wAttBonus].value += 1
The other thing I am trying to do now is the material changes the critical threat range by 1. I am having issue finding an good example on how to increase the threat range of a material. I have looked at the keen item attribute but it doesn't help much. I also looked at the improved crit feat and still no idea how to do this.
Thanks for any suggestions.