An image processing system and a software program which simplify customizations when a program for operations in connection with image processing is installed in a plural number of image processing apparatuses. When a program for operations in connection with image processing is newly installed in a first MFP, the first MFP makes an inquiry to other MFPs which are connected to the first MFP via a network. When a second MFP is already installed with the same program and has information on individual users' settings for the program, the first MFP receives the setting information from the second MFP. Then, referring to history information and device information, the first MFP judges whether to store the setting information therein and whether to make modifications to the setting information.