This is how my lightbox looks like

As you can see, its just an ordinary cardboard box. I think that the size of the usual A4 paper box is the best for a similar lamp setting. For bigger boxes you would need bigger lamps I guess...

Anywayz, I took the box and created square holes in each side of it. Next thing is to cover the holes with white tissue paper (any kind of semi transparent kind of paper would do actually) so as to blend the light smoothly. Just leave the front hole free (obviously...) 

Next thing is to start playing with the light. I got 2 lamps loaded with 80Watts daylight bulbs which are pretty much ok although I should start trying using a 3rd one I guess, or stronger bulbs. I have arranged them in this way, although again I'm open to suggestions here as it seems that there is room for improvement. 

Finally I have printed several backgrounds with my latest one being this brownish that you all see featured in my latest minis. This is something personal for everyone but I feel that 2 colour gradients work better. 

I have also experimented with texture patterns as the mettalic plate that you see in the back of the brown one, I have the feeling that it isn't that effective as it distracts the eye from the centerpiece of the photo which is the model itself.

Finally I must give you the link to the articel that really inspired me in setting all this straight : http://strobist.blogspot.com/2006/07/how-to-diy-10-macro-photo-studio.html

That was my photographing experience presented in short, I would be really grateful if you could help me improve in any way!