Has anyone been able to adjust the ResourcesMinMax for Iron in the RandomMap.lua file? That file is in \ex\Game\RandomMap - at the same level as Classes.

I've extracted the files but haven't been able to find a hex editor that reads these correctly - I have NotePad++'s plugin (or decompile the LUA for that matter).

I posted a decompiler somewhere on the forums. It's fair from perfect (in fact, it's mostly terrible). I only posted because I noticed others were using it (based on their code doing things which weren't quite right). If the decompiler doesn't work I'm afraid you'll need to rebuild the logic from the opcodes. (Personally I find it faster to rebuild logic, as tracing the stack values and picking out references isn't too hard.)