F2wedit 126.96.36.199 will support new "Energy Weapon" flag to weapon protos, added in sfall 4.2/3.8.20 (thx to NovaRain).
This flag will force the weapon to use Energy Weapons skill regardless of its damage type.
If both "Big Gun" and "Energy Weapon" flags are set, the game will ignore Big Gun flag (i.e. EW flag has higher priority).
Checkbox "Energy" is visible only with Fallout2 game. When Fallout1 is selected the checkbox Energy is not visible (because this flag is not supported in Fallout1).