Here is a patch for Fester's Quest which converts the mapper from MMC1 to MMC3.
Fester's Quest (USA).nes - NOINTRO
CRC32: DB0C7019
MD5: 676D302EF1C8BFFA07B2BD58124DFD5D
SHA-1: DF91B37AABCF7742BB80EC2B7F5384DF7940BE58
SHA-256: 3827DC6D9341105474E8966354AEA5B4114D5957D4D8BFC43D92172750E91260