#320 Bad (but unimportant) installer actions for system DLLs

[Daniel Sutcliffe]

The MSI package for the OpenSTA 1.4.3 release and
earlier is specified to install certain "system" DLLs.
These specifically are PDH.DLL, PSAPI.DLL and
MGMTAPI.DLL. The installer specification for these is
not as Microsoft recommends but this appears not to
matter except for reports on some (non-English)
installs where error messages may be given about an
inability to install over system versions.

PDH.DLL and PSAPI.DLL are only required to be installed
on NT4 and Microsoft recommends installation in the
application directory. The OpenSTA installation has no
conitional for their installation and attempts to
install in the system directory. It appears that the
installation will not be able to overwrite the files in
the system directory but that the installer "hides"
this error unless on some non-english Windows
installations.

MGMTAPI.DLL is seemingly not even required by any part
of the OpenSTA installation but is still listed in the
installer.