How to install this, and pretty much all romhacks.

1. Click on "Rom Patcher JS".

2. Click on the folder next to "Rom File:" 
Then, choose your Explorers of Sky Rom, or you old PMD Hell / Heaven rom if you just want to apply an update.
⚠️⚠️⚠️ Make sure it's a clean version, and not Xenophobia. ⚠️⚠️⚠️

3. Click on the folder next to "Patch File:" 
Choose your PMD Hell or Heaven xdelta file. 

4. Next, click on "Apply Patch".
If everything is good, the logs will tell you that the patch is successful.
Rename your old Explorers of Sky Rom to Hell or Heaven, depending on your version. Don't forget ".nds" in the end of your file name.
If your patched rom have ".txt" in the end, remove it and put ".nds"
Play the game on the desired emulator. 

5. The popular error message: "xdelta3: target window checksum mismatch: XD3_INVALID_INPUT" usually 
occurs when your Source file is not the required clean PMD Rom. 
It is possible that you are trying to apply a patch over an already patched file. 
To double check, try checking hash value as explained earlier.

If you need some help, here is where you can contact me : 
Discord : babou#0001
twitter : @babouzzz

