[ShadowChemosh]

The fighter groups are Custom Ability and and their is a different one for each group. The important thing is that the Group Tag is actually located on the weapons themselves.

So you need to create your new Weapons first and in the "Weapon Group" you want to select - New Tag - which lets you actually create a new weapon group. Name it something useful like Guns. Then make sure you do a Test Now! to have the system make a new tag right away. When you look again you can see a new tag called wFtrGroup.Guns was created.

So back on the Custom Ability tab do a New (Copy) on an existing fighter group and look at the Eval Scripts. You will see one has a perform scripting that is assigning wFtrGroup.Axes in example. Just change that to match what you created on the weapon (ie wFtrGroup.Guns).

Make it is all saved and do a Test Now! on the new group and you should be good to go.