http://bugs.winehq.org/show_bug.cgi?id=14640
--- Comment #4 from Rico kgbricola@web.de 2008-07-27 08:03:17 --- Created an attachment (id=15091) --> (http://bugs.winehq.org/attachment.cgi?id=15091) workaround for running 16 bit colour apps on 32 bit desktop
This workaround makes wine to be not so strict with the iPixelType. Could you give it a try?