http://bugs.winehq.org/show_bug.cgi?id=22237
--- Comment #2 from Vincent Povirk madewokherd@gmail.com 2010-04-02 09:26:23 --- It looks like the next failure is due to missing ngen.exe.
Exception in InstallAssembly(Interop.WIA.dll, True, False, False): System.ComponentModel.Win32Exception: ApplicationName='C:\windows\Microsoft.NET\Framework\v2.0.50727\ngen.exe', CommandLine='uninstall "Interop.WIA" /AppBase:"C:\Program Files\Mono-2.6.3\bin"', CurrentDirectory=''
http://msdn.microsoft.com/en-us/library/6t9t5wcf%28VS.80%29.aspx
But it also looks like the installer is getting its AppBase path wrong. We probably need mscoree to embed mono rather than calling mono.exe so that the application gets a correct command line.