Just a current save and a description of what you are doing exactly in game and with the trainer, when you activate, where in game you activate like a menu screen or in gameplay and anything you think 0x90 needs to know. Then just give him a quick PM to let him know it has been uploaded. Basically he needs to know what you do so he can do it the same way to reproduce the result.
After a game update, more so for patchy type games like this, I usually find it best to run the game with no trainer and do a few things then re-save it, in case the game update changed the save structure in anyway and move value locations. Or try on a new game first to see if they still don't work right.