convert the freertos pic18f452 to pic18f4550

recently i’m learning the freertos and already the demo source code(use the pic18f452 microchip) from www.freertos.org and i’m now wanna convert the pic18f452 to pic18f4550. but i face the problem.. p/s:i just want to use the freertos to blink my led as my 1st task..=.=