General information and hacking approach help?

[reed07]

I have quite a bit of programming experience but am pretty new to game hacking.
I want to create a hack for Diablo3 that doesn't involve injection or modifying the game memory--I simply want to read information that isn't normally accessible and display it in my program. In D3, maps are randomly generated and certain monsters have a chance to spawn and in random locations. Because of this, it can be beneficial to create a program that would scan the current map for a unique unit and display if it exists and if it does then its location.
What memory scanners do you suggest for this? I am currently using cheat engine.
Whenever I use cheat engine it seems to only scan addresses that are on the stack and not dynamically allocated memory, where the monster information is probably stored. Anyone know what I'm doing wrong?
What techniques do you suggest that I use for figuring out how unit information is stored in the game or a general approach to my problem?

[Abystus]

3D games use an object manager to house all objects loaded in memory (characters, items, etc). There are structures that house all attributes of each object such as type, name, level, position, etc... that are referenced by the object manager as a pointers. Basically you have to write an application which can read such values from the object manager, look up the object structure, and handle each one appropriately by object type. You will most likely find all the examples you could ever want here.