Soap Film Set-Up
This is simply the method I used for the soap film images. With this set-up I can use an f-stop of 32 to get a lot of the image in focus and yet get enough light from the flash guns. The way I've been doing some of these is to blow slightly on the soap film to give it a "swirly" effect. The hardest part for me is the focusing. I find it difficult to focus properly when the soap film is in motion.
There are good tips in the discussions in the Soap Film group.