I've added more items. However it's a very time consuming process and the game is rather old. So I've added the possiblity for you to discover and add missing items yourself.
When you launch the trainer and activate it and do what is necessary for the inventory editor to work you will see that once you clicked on an item (I always work with the first inventory slot) the item ID is shown on the editor.
Below there is an edit box for you to set a new item ID. Just increase by +1 and go back ingame to see what item has the new item ID you set.
Repeat these steps until you found the item ID of the item you looked for.
//edit: In case you have difficulties to understand how it works I can help you via teamviewer. It's a very simple process once you understoood how it works.
[Edited by 0x90, 2/8/2017 3:22:51 PM]
Very very very big thank you! If i will have a questions, a will ask you. Thank you once again!