Thanks to all of you for your feedback.
Setting the PATH environment variable to pick the unzip from cygwin instead of Oracle 9i - resolved the installation of the Libraries.
After doing distclean (Step 2.2.9 - "nmake -f Makefile.nmake distclean"), I tried to build Wireshark (Step 2.2.10 - "nmake -f Makefile.nmake make all").
During the build process, I get the following error:
/***/
Microsoft (R) Program Maintenance Utility Version 6.00.9782.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.
'zlib1.dll' is up-to-date
if not exist C:\wireshark-win32-libs\zlib123 mkdir C:\wireshark-win32-libs\zlib123
if not exist C:\wireshark-win32-libs\zlib123\lib mkdir C:\wireshark-win32-libs\zlib123\lib
if not exist C:\wireshark-win32-libs\zlib123\include mkdir C:\wireshark-win32-libs\zlib123\include
mt.exe -nologo -manifest "zlib1.dll.manifest" -outputresource:zlib1.dll;2
'mt.exe' is not recognized as an internal or external command,
operable program or batch file.
NMAKE : fatal error U1077: 'mt.exe' : return code '0x1'
Stop.
/***/
When I do a search on the Manifest Tool (mt.exe), I dont see it anywhere on my C Drive. I am running Visual Studio 6 . Is this exe part of Platform SDK? Should I expect to see it under "C:\Program Files\Microsoft Visual Studio\VC98\Bin"?
FYI , I have run VCVARS32.bat from "C:\Program Files\Microsoft Visual Studio\VC98\Bin" as per the instructions.
