Thanks Rentacow,
I think I played the 'second hardest' version. It took a nervous hour to get the chopper up - once I did though, it carved up. That's all I'll say.
I got one crash to desktop on the first time - but that might have been due to overuse of time acceleration and alt-tabbing...
Working on some more maps at the moment...I've got holidays coming up - and want to work on some 'shorter' Ukraine missions.

Stew