Nice looking modles. I look forward to seeing more.
As far as the tip you asked for, something I picked up along the way that isn't that hard to put together or expensive for that matter. Good lighting is typically the key to getting good pictures out of even a bad camera. Building a light box is not typically that hard.
Take a large box put it on its side so the top, the part with the opening is facing the direction you wish to shoot the picture from. Then cut a large rectangular hole in each of the sides and the new top, if you also wish to have a third downward light. Cover those holes with white baking paper, the non wax kind. This paper is good against the heat but still let's light through and defuses it to fill the inside of the box. Take a couple of desk lamps preferably the adjustable kind and put full spectrum daylight bulbs in them. Shine those light through the paper into the box. Place a white peice of paper that flows from the back of the box down the bottom let it have a smooth transition rather than stuffing it in the corner of where the bottum meets the back. Place your models in the box turn on your lamps and your ready for your photo shoot. Make sure you know how to set your white balance and turn off the flash as you obviously won't need it.
Hope that helps.
Red