This reminds me something about the CRC of each ROM.
As I change the ROMs, how could I avoid that CRC checking?
Any advice will be greatly appreciated
Any new or modified version of a ROM set will not have built-in support in MAME.
The DK trainer ROMs are a plug-in replacement for the regular Donkey Kong ROMs, but as they contain different contents so MAME will report that the CRC does not match the original ROMs.
New versions of MAME when using the GUI (graphical user interface) will prevent you from running a modified ROM. I'm not sure if there's some setting you can change to allow it.. maybe someone can chime in.
But you can run MAME from the Command prompt and that lets you play the DK Trainer ROM. Yes, it'll still report that the CRC is incorrect, but you just type OK and it'll run.
Old versions of MAME might allow you to play DK trainer using the GUI, but I'm not sure which.