Quotes under spoiler tag.
Love the video. It does work.
I also discussed this in PM with @Krakken and I found a route that worked closely to the original.
Primarily, you will need an item in your inbox to search. Preferably that amount will be 100 or more.
Search for the item amount by Dword.
Once the search completes, have one inventory slot open and hit "Take" to reduce the amount by the amount of a single inventory stack.
Refine the search with the new amount.
Repeat the split/refine until you get a single entry. Select that entry, then select "GoTo" in the pop up window.
Now comes the tricky part. Scroll up a couple lines and examine the entry you just found (highlighted usually)
You will be looking for two contiguous entries. (The two entries are right next to each other ....)
Both will be Dword entries. One will be the item amount you searched. The other will be another number.
Make a note of these two values, noting which is the quantity. You will want this for later.
Scroll through the listing of entries. Scrolling down through the list will bring up entries that are graphically below the item you searched for.
Hence the reason you searched for an item amount at the end of the list.
Find the item you want to edit. If it has an "x###" in the inbox, look for that number. If it is a weapon or armor, look for a 1.
Again, this will be part of a duplex Dword pattern.
Now comes the part that can completely scramble your efforts.
First, locate the entry of the pair that is NOT the quantity. Change this value to the corresponding value you noted from before.
Next, locate the entry of the pair that IS the quantity. Change this to the quantity that you noted earlier.
Lastly, exit and restart. Make sure you have an inventory space open. Open the inbox and tap "Take" and see if the changes held.
Thanks to @Krakken for the invaluable help in deciphering the pattern logic.