This game is extremely easy to use cheat engine on. Especially the resources.
During my testing I was able to find the values for the resources in Highcliff and change them the usual way: process of elimination. What I discovered is that if you change the value of the resources in your cart then the Cargo number doesn't change, so you can essentially carry the stuff anywhere.
If you choose to sale the stuff in your cargo, you get the bars for it and your cargo weight enters into negative values, which doesn't seem to cause any problems besides letting you carry all you want.
I also notice that some addresses seem to change depending on whether you're selling or buying. One address I used to change a resource in my cargo suddenly changed when I was selling it back, allowing me to manipulate the stock of what was in the town instead.
Anyone who knows anything about Cheat Engine can find the value and change it to what they want in less than a minute. You can be walking around fully stocked with everything you can imagine, or sell it back and get an ugodly sum of bars to improve your standing.
Until a cheat is found this is the easiest way to get bars and resources.