I would not recommend using the camera's flash for photographing miniatures, specially in Macro mode.
Macro lets you take pictures very, very close to the miniature. We are talking distances of less than 3 inches on some camera models. The camera flash at this distance will cause a glare on the mini and will "wash out/burn out" all the details and color. The effect is similar to what happens when you use a flash to photograph something through a glass pane/window. The glass window reflects the light directly to the optics on the camera and al you get is a picture of the flash reflecting off the glass.
The Cool Mini or Not website has many articles/tutorials on how to set up a rig for photographing minis. I tried to add a link but the site seems to be down.
You can use a single source of light for photography though I'd recommend at least two. An overhead light and a front/side light. With at set up like that your minis will be illuminated in a way that creates good shadow balances. Essential for mini's photography is a tripod. You can get an "elcheapo" tripod at Wal-mart for less than $10. The next thing is a camera with a Macro feature.
That's my two pence.
Gizzard, very good job on both the Otyugh and the goblin. I'd like to see more detail on the base. A well done base adds so much to a miniature.