Johan,

Thanks for your help on these.

I will give these a try, especially the smoke as I have tended to use the same one each time.
As for the duration time's etc. as I have said before I will leave this as a figure of about 30 sec's as these missile have ranges of hundreds of miles in some case's and I did not want to add huge gerat times in that may hog FPS for something that you cant see even though the sim is still trying to render it and its smoke.
So what ever you feel good with, 40 sec's is perhaps a good figure for the long range weapons I think.
I will try the smoke effect when I get back from vacation - off for 2 weeks of doing nothing next to a beach.

Pete