you can also do something like this to allow your code to compile for different processors...

Code:
#IF __PROCESSOR__ = "16F1828" or __PROCESSOR__ = "16F1829"
    #CONFIG
           __CONFIG _CONFIG1, _FOSC_INTOSC & _WDTE_ON & _PWRTE_OFF & _MCLRE_OFF & _CP_ON & _CPD_OFF & _BOREN_OFF & _CLKOUTEN_OFF & _IESO_OFF & _FCMEN_OFF
           __CONFIG _CONFIG2, _WRT_OFF & _PLLEN_OFF & _STVREN_OFF & _BORV_25 & _LVP_OFF
    #endconfig
#else

#IF __PROCESSOR__ = "16F690"
    #CONFIG
           __CONFIG _INTRC_OSC_NOCLKOUT & _WDT_ON & _PWRTE_OFF & _MCLRE_OFF & _CP_ON & _CPD_OFF & _BOD_OFF & _IESO_OFF & _FCMEN_OFF
    #endconfig
#ELSE 
    #ERROR "Program does not support " + __PROCESSOR__
#ENDIF
#endif
#msg "compiling for target " + __PROCESSOR__