As confusing as this was for me at first, it is actually VERY simple.
Here's what you do, and it ONLY works with Human 1 hand weapons (as far as I know. I tried doing it with a Shadow-Off and it didn't work so I assume it only works with human 1 hands as Petani said.
Step 1: Do a string search for the name of your sword. Exactly as step 1 in the tutorial Petani made.
Step 2: Right click the first address that shows up in the results and view it in the hex editor.
Step 3: To check if you have the correct address, you should see a layout of something similar to what Petani posted in the screenshot. It should have tha name of your weapon followed by a bunch of ". . . ." 's and then say item013 or something like that (the item numbers may vary).
Step 4: Now locate the Helper window. It is either attached to the Hex Editor, as in Petani's screenshot, or it is in a separate window that opened when you opened the Hex Editor.
Step 5: Once you have located the helper window then change the address's 3rd number from the right. In the screenshot posted it was " 05A541D4 " would change the 1 like this - 05A54
1D4 ---> 05A54
0D4 . Don't be worried if your address has a letter there and not a number. Say your address is 05A54ED4, you would change the E to one letter below E. So you would change 05A54
ED4 ---> 05A54
DD4 . So, 9 would change to 8, 7 to 6, D to C, etc. This step will simply shift the line your Hex Editor is viewing. It will move it up slightly.
Step 6: Once you have finished step 5 and have move the Hex Editor's view up a bit you will see something similar to the screenshot posted in Petani's Step 3. From here you only need to find the 2 lines highlighted in pink that are right on top of eachother. Then from the top pink line you move past the 0F over to the 05 and that is what you will edit.
Step 7: Change the 05 by double clicking it and typing in a new value. Once you change the value it will apply to ALL of the sword that you have that name. So to put a weapon in every slot you need to first equip one into each sword hand. Then change the value and place one into the new equipment slot, then repeat with all of the slots.
Codes:
Shirt = 01
Tunic = 02
Glove CON = 05
Boots CON = 06
Armor CON = 07
Helm CON = 08
Necklace = 41
Ring = 42
Hope this helped!!!