Just to close this post off, my problem was with the graphics card.
Not sure why but it wasn't up to the job. FSX SP2 didn't report it as such, but when I upgraded the card and re-installed SP2, Plan-G it worked fine.
Phill
Not sure why but it wasn't up to the job. FSX SP2 didn't report it as such, but when I upgraded the card and re-installed SP2, Plan-G it worked fine.
Phill