According to op:
Hello, friends.

For this occasion, I have created my engine patch for WinMUGEN, which allows you to create simul matches with a maximum of 4 characters instead of 2, while several code fixes were made to improve the game experience.

Warning:
As expected from engine patches, unpredictable results could occur if known exploits are triggered in this program version, so keep it in mind while selecting your characters.

...
There is also a 1.00/1.1b patch version in case you need them.