Steps to patching Assassin's Creed 2 (to work on the R4).

1. Extract the contents of this file to desktop or somewhere.
2. Open IPSWin.exe in the "ipswinger" folder.
3. Under "Original Datei", search for the (Unpatched) Assassin's Creed 2 - Discovery rom.
4. Under IPS Patch, choose the file "Rudolph_Child's_Play_Patch.ips" under the "improved_patch" folder.
5. Click on Patch! And you're done. 

Assassin's Creed 2 Discovery should now work on your R4. Contrary to popular belief, this game DOES work
on the Nintendo DS Lite. The Wanted feature is optional for those who have a DSi.