OKAY, listen to me now, follow my EASY steps, STEP by STEP
Step 1:
go in to the editor
Step 2:
make sure it is the warcraft III World Editor
Step 3:
Click on the mask button in the tool bar, it will take you to the Object Edior
Step 4:
While in the Object Editor, click on Upgrades
Step 5:
Under Standard Upgrades, go to Human
Step 6:
Choose "Iron Forged Swords"
Step 7:
Change Data Effect 1 to Attack Damage Bonus
Step 8:
Change all other data fields as you want
Step 9:
Change Stats and Level 1-?? Art Icon s to what you want.
Step 10a:
Make the towers from the units described in
Level 1 - Text - Tooltip - Extended
Step 10b:
If you want it to effect all towers, change
Stats - Applies to All Units to TRUE
Step 11:
Chane the name of the upgrades under Level 1 - text
Step 12:
TEST THE MAP