Very nice and professionally done silhouettes of fashion girls. Currently people’s silhouettes are very popular vector shapes among vector stocks and digital artists. Because it is not too difficult to draw them and use, but they can make you graphics look really good looking & attractive.
It’s very elementary to modify any vector file: resize, change color, replace shapes, rotate, add other elements.
Vector files can be edited in many computer art programs, for example: Xara, PMView, Quark, Corel Draw, Macromedia Freehand, and surely All Adobe programs Photoshop, Indesign, Illustrator etc. can be used to open and edit vectors. Adobe Illustrator my certain choice!