Instructions
Open a Web browser and navigate to zezula.net. Click the "Downloads" link beneath the MPQ Archives and then click the MPQ Editor download link that corresponds to your operating system to download the install file.
Double-click on the MPQ Editor's install file and follow the onscreen instructions to install the program on the computer.
Double-click the MPQ Editor file to launch the program. Click "File" and then select "Open." Locate the map file you want to edit on the computer's hard drive and double-click it. Click "OK" when prompted to open the map in the program.
Double-click "Objects" in the program window to launch the Notepad program and edit the objects that appear on the map.
Look for the section of code for the mineral you want to stack that resembles the following:
<Unit id="45" variation="5" position="99,21.5,0" scale=".6,.6,.6" section="zeus" unitType="HighYieldMineralField">
Highlight the code and then right-click the highlighted text to open a context menu. Select "Copy."
Right-click somewhere in between the "?xml version="1.0" encoding="utf-8"?>
Repeat Steps 5, 6 and 7 for any other minerals you want to stack. Click "File" and select "Save As" to save the edited map objects file to your computer's hard drive.
Right-click "Objects" in the MPQ Editor window and select "Add File." Locate the modified map objects file you saved in Step 8 and double-click it. Click "Yes" when prompted to overwrite the map's objects file. You can now play the map with the stacked minerals you added.
<AIRebuild index="0" value="0"/>
<AIRebuild index="1" value="0"/>
<AIRebuild index="2" value="0"/>
<AIRebuild index="3" value="0"/>
<AIRebuild index="4" value="0"/>
<AIFlag index="IsUseable" value="0"/>
</Unit>
<PlacedObjects version="26">" lines of code and the "</PlacedObjects>" line of code. Select "Paste" to paste the code in between these lines of code.