Cheers - it didnt work - but its a very useful little screen any rate.
As this was bought new from apple i have 90 days complimentary tech support so i will call them tomorrow daytime (we are on GMT so between 5 and 8 hours ahead of us time).
I will let you know how that goes.
I woudl say though that i am besotted with the mac way of doing things so far

