So I think I got it to work... and it didn't really work. I got the second trainer activated sound... after i could activate and deactivate. However my characters would still get encumbered. I guess I can just deal with it until they release the mod tool set.
I get the same as well, I've tried it when the game started, after I picked up an item and after buying and selling. I can get the trainer to activate the Op. but it don't seem to do anything. But I bet if there is a way to make it work 0x90 will find it when he get the time.
Send me your savegame with encumbered status please.
I'll send it to you, I only hope I get the right thing you're asking for Brah.