I use post build scripts at work all the time. Do not place the Quotation Marks in your post build events. They are not needed.
Here is a sample of one of mine:
copy /Y $(ProjectDir)\user.config $(TargetDir)
copy /Y $(ProjectDir)\ShellHelp.chm $(TargetDir)
copy /Y $(ProjectDir)......_dist\StaticList.xml $(TargetDir)
Wade