What this patch does is add extracted graphics from the game to some extra space that exist in the rom, and allows for easier Hacking of the graphics because they are extracted for you. They still have to be put into the correct places in the Rom.
Now Includes a extra patch that has Pac Jr.
As Far as is known this does not effect the playability of the game.
Ms. Pac-Man (U) [!].nes
CRC32: b6d2d300
MD5: b7f24e66a7df5d102023977ab887d97e
SHA1: F92161296E7CBA0B9A573D00EABF8581914BCA56