PIC18F2550

Hi,
Could i use another kind of PIC instead of PIC18F2550. Will the firmware of PIC18F2550 work in a diffrent PIC. Could i use firmware of PIC18F2550 to another PIC?
Thank.
Could i use another kind of PIC instead of PIC18F2550. Will the firmware of PIC18F2550 work in a diffrent PIC. Could i use firmware of PIC18F2550 to another PIC?
Thank.