Thanks Robert,
I use a studio flash in a softbox. I find that reptiles, in general, photograph well under a softbox. It eliminates the kind of specular replections off the scales that can happen with a point-source light (especially apparent on reptiles with dark scales like Gilas).
Gilas (especially hatchlings) can be very tough to photograph well because of the contrast--very black scales against light scales. If you expose for the light part, you loose detail in the blacks. Likewise, if you expose for the black, you blow-out the highlights. A softbox helps this alot.
Also, any time you can get the lightsource away from the camera, it helps the image a lot.
Mark