Thanks G & Apop: I've been flying by the seat of my pants in Photoshop (presently 7) for 20-odd years. I used to do a lot of 'digital vignettes' with mine and other's models - mostly in flying arrangements; but for the last 6-7 years I've concentrated on drawing (in PS 7) - large formats: the more pixils, the more accurately they can be arranged. But the longer it takes - especially if one is a self-taught amateur..... like me.
Cheers, Bob A.