http://bugs.winehq.org/show_bug.cgi?id=15868
--- Comment #30 from Rico kgbricola@web.de 2009-01-10 14:35:07 --- The speed problem is fixed in current git.
If you have some time, you could search the source of the grey wall (probably something todo with fog?) which takes all the screen here. Only the osd is shown (ORM=fbo).