Here is a patch which converts the original mapper in Knight Rider from MMC1 to MMC3.
Knight Rider (USA).nes - NOINTRO
CRC32: 604FA3FC
MD5: 303E1BA6CA9FD2E14DEC8D399A5E942A
SHA-1: C0958D55674C897401C0DA15C238E1C03ADAF756
SHA-256: 6E822C93F64347032847BCAA46728EB324E8FE7DC8746A6A9E6512BC7BA39CC2