stig99:
I know you said that you "sussed" this whole thing, but I just thought that I would let you know why the 50's icons may not work for you. They were created for the DROID Eris, which has practically half the resolution of your device. So, even if the image would place in the widget, it would probably be distorted or incorrectly spaced.
It looks like the Samsung Galaxy has a resolution of 480x800. Just look for icons with that resolution listing (like all of the ones I posed for the Incredible) and they should place correctly.
Also, I find that Astro File Manager works really well for selecting the images for Desktop Visualizer. It shows a thumbnail of the image as well as the files name- this way you can make sure the image you're selecting is the same as the widget size you're creating.
Don't give up on it! It's super cool when it's done!
Thanks Paul
Much appreciated.