1. click and drag the clothes onto the body top in the center(they may not move so you may want to save them as bitmap files and do it on your regular paint program!)
2. press the print screen button (next to F12) and then open a graphics program.
3. Then open a new image, a large one in width and length, and under the edit menu choose paste. The screen capture should show up.
4. Then choose the crop tool, it's draws a box with dashing lines around the selection you've chosen. Then after you've chosen the area around your doll, with the background being grey, go back to the edit menu and go to paste.
5. If there's a paste menu that comes out, choose paste into a new image. If not, choose the crop tool and select done and it should go to the size of your doll, depends on the program.
6. Then save that image as a .gif file and choose the grey background colour as the transparent colour.
If you're still lost, check the help section of your graphics program, it should tell you how to do this.
Sorry about the broken images, one of my servers was deleted :(