INTCKO is not a valid fuse in my current MPASM version (5.11) for the 18F2550
Code:
;----- CONFIG1H Options --------------------------------------------------
_FOSC_XT_XT_1H       EQU  H'F0'    ; XT oscillator, XT used by USB
_FOSC_XTPLL_XT_1H    EQU  H'F2'    ; XT oscillator, PLL enabled, XT used by USB
_FOSC_ECIO_EC_1H     EQU  H'F4'    ; External clock, port function on RA6, EC used by USB
_FOSC_EC_EC_1H       EQU  H'F5'    ; External clock, CLKOUT on RA6, EC used by USB
_FOSC_ECPLLIO_EC_1H  EQU  H'F6'    ; External clock, PLL enabled, port function on RA6, EC used by USB
_FOSC_ECPLL_EC_1H    EQU  H'F7'    ; External clock, PLL enabled, CLKOUT on RA6, EC used by USB
_FOSC_INTOSCIO_EC_1H EQU  H'F8'    ; Internal oscillator, port function on RA6, EC used by USB
_FOSC_INTOSC_EC_1H   EQU  H'F9'    ; Internal oscillator, CLKOUT on RA6, EC used by USB
_FOSC_INTOSC_XT_1H   EQU  H'FA'    ; Internal oscillator, XT used by USB
_FOSC_INTOSC_HS_1H   EQU  H'FB'    ; Internal oscillator, HS used by USB
_FOSC_HS_1H          EQU  H'FC'    ; HS oscillator, HS used by USB
_FOSC_HSPLL_HS_1H    EQU  H'FE'    ; HS oscillator, PLL enabled, HS used by USB

and the OSCCON was right in the first post.

Sorry mackrackit