Hi Mister e
I have finally got most of it sorted.
I used the line

PBPW -p18F4320 MyProgram -ampasmwin -v

and hey presto

@ ERRORLEVEL -230

@__CONFIG _CONFIG1H, _IESO_OFF_1H & _FSCM_OFF_1H & _RC_OSC_1H


ADCON1 = $0F
CMCON = $07


Start:

High PortA.1

Pause 1000

Low PortA.1

Pause 1000

GoTo Start

Work with only one warning 1 suppressed 1

[205] blah blah : found directive in column 1. <__CONFIG>

but I believe that will be ok.

Next... put it inot the chip and see.... will advice