After trying for a few hours, for those that want to do it through GameGuardian:
1. search for the price of chests as in 400;4000 DRWORD. nothing special
2. you should get about 8-10 values
3. edit the last 2 (or even all of them) to 1.
4 buy the chest, even if it shows 400, it will jump to 1
5. edit to -1000 (or 0 first, im not sure)
6. buy some single chests
7. buy infinite inventory, your chips will show 10 or whatever you had-1, but you can buy anything. the real value is -1000 times the amount of chests you bought.
8. do whatever you want with above info. I bought about 100k energy and thousandsof chests and material...
I had to try several times... so it might not even work for some of you.