I tried the instructions to compile and build the MYSQL Plugin using the known instructions:
How to Build the QMYSQL Plugin on Windows

You need to get the MySQL installation files. Run SETUP.EXE and choose "Custom Install". Install the "Libs & Include Files" Module. Build the plugin as follows (here it is assumed that MySQL is installed in C:\MySQL):

cd %QTDIR%\src\plugins\sqldrivers\mysql
qmake "INCLUDEPATH+=C:\MySQL\include" "LIBS+=C:\MYSQL\MySQL Server <version>\lib\opt\libmysql.lib" mysql.pro
nmake

If you are not using a Microsoft compiler, replace nmake with make in the line above.

Note: This database plugin is not supported for Windows CE.

Note: Including "-o Makefile" as an argument to qmake to tell it where to build the makefile can cause the plugin to be built in release mode only. If you are expecting a debug version to be built as well, don't use the "-o Makefile" option.

However, when do compile by changing nmake to make then I get the error:
C:\Qt\2009.01\qt\src\plugins\sqldrivers\mysql>C:\Q t\2009.01\qt\qmake\qmake "INCL
UDEPATH+=C:\Program Files\MySQL\MySQL Server 5.1\include" "LIBS+=C:\Program File
s\MySQL\MySQL Server 5.1\lib\opt\LIBMYSQL.LIB" C:\Qt\2009.01\qt\src\plugins\sqld
rivers\mysql\mysql.pro make
Could not find mkspecs for your QMAKESPEC(win32-g++) after trying:
C:/qt-greenhouse/Trolltech/Code_less_create_more/Trolltech/Code_less_cre
ate_more/Troll/4.5.0/qt\mkspecs
Error processing project file: C:/Qt/2009.01/qt/src/plugins/sqldrivers/mysql/mys
ql.pro
Cannot find file: make.

The c:\qt-greenhouse directory does not exist on my machine therefore, what should have been the correct path relative to my machine?