Photo to CG look...how is it done?

[embdude]

I ran across several images that seem to have originated as photo but have been photoshopped into more of a vector or computer graphic look.

Does anyone have a method for doing this or know of a tutorial?

here Are a couple of examles

http://www.1nax.ru/media/2006/03/17/art/image005.jpg
http://www.1nax.ru/media/2006/03/17/art/image001.jpg
http://www.1nax.ru/media/2006/03/17/art/image002.jpg
http://www.1nax.ru/media/2006/03/17/art/image003.jpg
http://www.1nax.ru/media/2006/03/17/art/image006.jpg
http://www.1nax.ru/media/2006/03/17/art/image004.jpg
http://www.1nax.ru/media/2006/03/17/art/image007.jpg
http://www.1nax.ru/media/2006/03/17/art/image008.jpg
http://www.1nax.ru/media/2006/03/17/art/image009.jpg
http://www.1nax.ru/media/2006/03/17/art/image010.jpg
http://www.1nax.ru/media/2006/03/17/art/image011.jpg
http://www.1nax.ru/media/2006/03/17/art/image012.jpg