Tony,
If your screen is flickering, it is a hardware issue - maybe loose connection between the WHITE ribbon cable and CPU board. You would have to remove this cable completely, then re-insert into slot. Then press the end-caps which secure the cable into place - be very carefull as this ribbon is very thin. This loose connection is what is probably causing your screen to flicker!
4.1 brings in the COPY from to STYLE part (complete) and enhances some other minor stuff.
Thanks,
AJ