It looks like you have found a new bug. That function seems to be not implemented in wine (http://source.winehq.org/source//dlls/msvcr90/msvcr90.spec#L352) Try "winetricks vcrun2008" [1]. If that worksaround this problem the best thing to do is to report a new bug with subject "RaiderZ needs msvcr90.dll._byteswap_ulong", attach the same log as you added here and also add the url from this thread. [1] - http://wiki.winehq.org/winetricks
