First- you need to select a dress up you would like to use as a base.OR you can use your,doll.
second-Use the snipping tool to snib the doll.(undressed)
Third- open up GIMP.Download from here:http://www.gimp.org/ . completely free!
fourth- Add a layer named 'highlights'
fifth- Select the colour white,and select paintbrush.DO THIS:
sixth- select 'filter' then blur and then gaussian blur.Blur about 35.0 OR 40.0
eighth- and again gaussian blur 37.0
ninth- grab the free select lassoo and bucket fill with your faces skin colour.(add your dolls face)
UNDER CONSTRUCTION!