You don't have to do any other settings.
You can directly use the functions
bit I2CWrite(BYTE i2cAddr, WORD addr, BYTE write_dat) and
bit I2CRead(BYTE i2cAddr, WORD addr, BYTE *read_dat) which are present in the i2c_hw.c file.
If you need any technical help from Cypress related to I2C or any other block for that matter, please create a tech support case so that one of our engineer will help you in developing firmware or the application on the PC side. Also in debugging the firmware.