These files are related to the symbol and source server.

This requires some Microsoft utilities.  From a 32-bit WinDbg installation with
source server support, copy the following files to this directory:
  dbghelp.dll
  pdbstr.exe
  srctool.exe

The follow files were copied from the BSD licensed pefile-1.2.9.1:
  COPYING-pefile
  pefile.py

pefile is available from:
  http://code.google.com/p/pefile/