Hey Bern,
Berns_Offset_imperial.ngc (172 Bytes)
Berns_Offset_metric.ngc (170 Bytes)
G90 ; Set Absolute distance mode
G20 ; Set Imperial units mode
G92.1 ; Delete any previous offset
G0 X4.033 Y4.04 ; Rapid move X and Y
G92 X0 Y0 ; Set X and Y zero here
This assumes you already homed the machine. To add a home command, this would be prepending G53 G0 X0 Y0 (and possibly add Z0 if you want).
Explanation: G53 (Move in machine coordinates)
EDIT: You mean 4.033 millimeter? Oh, I corrected this.
EDIT2: Not millimeters? Okay, back to inches.