/WEXP RANGE waterexplode.range.view Shows you the effective range of creeper explosions. This does NOT affect a creeper's stock explosion damage, so if you set it to like 100 it doesn't mean a player 50 blocks away will take damage. It only affects the materials in the material list.
/WEXP RANGE #
waterexplode.range.set Sets the range
/WEXP MATERIALS LIST waterexplode.materials.list Lists what materials are broken by creeper explosions within the range
/WEXP MATERIALS ADD material
waterexplode.materials.add Adds a material to the list
/WEXP MATERIALS DEL material
waterexplode.materials.del Removes a material from the list
/WEXP RELOAD waterexplode.reload Reloads config from disk