Thanks very much for all your help. I managed to achieve what i needed shortly after posting by putting the photos in photopaint with no background and then erasing the edges with the feather turned up to 100.
I'll have a play with your ideas now and see what happens.
Thanks again.
Andy.
Well I'll be..........! Never realized there was a dialogue window available to use with the transparency tool. That's pretty cool. Everytime I learn something new I wonder what else I'm not aware of. Thanks for posting. - Scotty
If the image is a bitmap, why not use the vignette effect?
goto Effects>Creative>Vignette then in the dialog box define the shape, and adjust the offset anf fade sliders to suit.
Bern.