http://bugs.winehq.org/show_bug.cgi?id=10505
--- Comment #11 from Hans Leidekker hans@it.vu.nl 2007-12-03 08:28:03 --- Copying the dll to windows/system32 is correct but you also need to tell Wine to use it, e.g:
$ WINEDLLOVERRIDES="usp10=n" wine wiso.exe