How do you change Attack Types?

I was trying to change the names and icons for the attack types (siege, hero, normal etc.) but couldn't figure it out. How can I change the names and the icons for attack types?

Goto the title toolbar, find 'Advanced' then find in the drop-down menu 'Game Interface.' Click that, in the window that now appears check the box that says 'Use custom data.' Look down the list for the icons you wish to change and replace them.

Be aware that many of the text entries will use rather "archaic" terms for some of the armour types (IE Small = Light). And due to the effects of patches changing data, several have multiple entires (there are about 3 for normal armour). A combination of checking the existing strings against the current game and trial and error should get you through though.