Yeah, I'd like to see that too, even if it's just in a trainer or modded file.
I tried to do it with both CheatEngine and ArtMoney, and while I always found the value (in seconds; 180 = 3:00), when I edited it and froze the value (with both programs), the changes never stuck.
Also, the address changes with every time you load a saved game, so it involves "pointers", something I'm not familiar with.