The the following.

Browse to where you have your PBP2.60 folder installation. Scroll down until you find the 18F25K20.INC file and open it in notepad. It should look something like this

Code:
;****************************************************************
;*  18F25K20.INC                                                *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2008 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 09/15/08                                        *
;*  Version   : 2.60                                            *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F25K20, r = dec, w = -311, w = -230, f = inhx32
        INCLUDE "P18F25K20.INC"	; MPASM  Header
        __CONFIG    _CONFIG1H, _FOSC_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
        __CONFIG    _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
        __CONFIG    _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
        __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
        NOLIST
    endif
        LIST
EEPROM_START	EQU	0F00000h
BLOCK_SIZE	EQU	32
Under the section "Include P18F25k20.inc" you'll see all the config settings... comment out all four lines thus:

Code:
;****************************************************************
;*  18F25K20.INC                                                *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2008 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 09/15/08                                        *
;*  Version   : 2.60                                            *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F25K20, r = dec, w = -311, w = -230, f = inhx32
        INCLUDE "P18F25K20.INC"	; MPASM  Header
        ;__CONFIG    _CONFIG1H, _FOSC_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
        ;__CONFIG    _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
        ;__CONFIG    _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
        ;__CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
        NOLIST
    endif
        LIST
EEPROM_START	EQU	0F00000h
BLOCK_SIZE	EQU	32
Now include the settings in your main PBP code
Code:
ASM
    @ __CONFIG    _CONFIG1H, _FOSC_INTIO67_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
    @ __CONFIG    _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
    @ __CONFIG    _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
    @ __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
ENDASM
This should compile correctly in PBP 2.60