I agree with Cendalla. You shouldn't need a hook to handle a Dumerils Boa. They're typically extremely docile snakes. Babies like to burrow, but adults rarely do. When I pick them up, I just slide my hand under their body and lift them up. If a snake seem edgy, you can hold a hide or a tub lid or something between their head and your hand that's reaching in. A nervous Dumerils Boa is much more likely to try and crawl away than strike.
@Salamander
Photographing snakes is very challenging. It's nearly impossible to capture their full color. Snakes usually look better in person than they do in pictures. A snake's iridescence is caused by by microscopic prisms in the surface of their scales. To capture the rainbow effect in a picture, you need your light source at just the right angle in relation to your camera. Just combine that with a little luck, and you may be able to get it on film.