you just need to modify the .INC in the PBP folders. My own file looks like that
Code:
;****************************************************************
;*  18F4550.INC                                                 *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2004 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 12/31/04                                        *
;*  Version   : 2.46                                            *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F4550, r = dec, w = -311, f = inhx32
        INCLUDE "P18F4550.INC"	; MPASM  Header
       ; __CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
       ; __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
       ; __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_128_2H
       ; __CONFIG    _CONFIG3H, _PBADEN_OFF_3H
       ; __CONFIG    _CONFIG4L, _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_OFF_4L
        NOLIST
    endif
        LIST
EEPROM_START	EQU	0F00000h
BLOCK_SIZE	EQU	32
not much.. it's the whole file i have.

Do you still use the Bootloader? Did you also use the DEFINE OSC 20?

How about your current one?