Hello Denis, 

First of all I would like to thank you for your kindly reply.

As I mentioned, I am so new to QNX and embedded system. So I don't understand how to do qt - qnx integration step by 
step. 

Let me introduce what I have done so far in order to run a simple qt code with QNX. 

I have installed  QNX SDP v6.5 on my windows 7 host. I have also Qt 4.7.4 (32 bit) installed with QT Creator 2.4.0. 

Now, I am following the instructions mentioned in readme.txt file. please check my comments between parentheses, if am I
 doing something wrong. I appreciate your kindly support. Thank you.

Installing host tools
---------------------

The following host packages are included:

  qt_qnx_host_win32_x86.tar.gz    Windows, 32-bit x86 ( I unpack it with winrar into the folder of C:\QNX650\host\win32\
x86\usr\bin )

Select the appropriate file for your host system, and use tar to unpack it to
the directory where Momentics was installed; for example:
  tar xzf qt_qnx_host_linux_x86.tar.gz -C /opt/qnx650


Installing target binaries
--------------------------

To build a Qt application for QNX, you'll also need to install the target
package on the build system.  One package contains the binaries for all
currently-available architectures (x86, armle, armle-v7).

Use tar to extract qt_qnx_targets.tar.gz to the directory where Momentics was
installed.  Use the tar command shown in the "installing host tools" section,
with the new filename. ( I unpacked it to specified folders under C:\QNX650\target\qnx6 )

Build targets for qmake
-----------------------

If your application is built with qmake, you can create QNX variants of the
application as follows (once the host and target packages are installed).

(Why we need qmake, what is the top-level application directory, how to create Makefile?)
In the top-level application directory, create a Makefile with the following
text:

LIST=OS CPU VARIANT
MAKEFILE=GNUmakefile
include recurse.mk
##eof

( I definitely no idea how to create GNUmakefile. Should I right click to mouse -> new text document ->changing name to 
GNUmakefile -> put below text inside of it -> save -> erase ".txt" extension. Isthat riight  )
Inside the same directory, create subdirectories called "nto-arm-le",
"nto-arm-le-v7", and "nto-x86-o", each containing a file called "GNUmakefile"
with this text: 

ifndef QCONFIG
QCONFIG=qconfig.mk
endif
include $(QCONFIG)
include $(MKFILES_ROOT)/qmake-qt.mk
##eof

The application can be built for all QNX targets by running "make" at the top
level.  All standard qmake targets should work (e.g., "make install").

Optionally, a ksh script called "build-hook" can be placed at the top level;
if present, it will be executed before running qmake or make.  This is useful
for setting environment variables.  (More advanced hooks are also available;
see $QNX_TARGET/usr/include/mk/build-qmake for details.)


Manual qmake invocation
-----------------------

qmake can also be executed manually; for example:

( where should I write this command? CMD is the right place to write it??? )
  "$QNX_HOST/usr/bin/qmake" -spec unsupported/qws/qnx-i386-g++

The following -spec options are available for QNX targets:
  unsupported/qws/qnx-arm-g++
  unsupported/qws/qnx-armv7-g++
  unsupported/qws/qnx-i386-g++

Target setup
------------
( it says copy files from QNX target system. My questions are: what is target system. Where is it ? Which folder is it??
? If you know can you share me the name of the folder and where is it?  )
Depending on the set of Qt libraries used by your application, it may require
any of the following files and directories to be copied from $QNX_TARGET to
the target system.  Replace $ARCH with the appropriate architecture-specific
directory, such as "armle-v7", but omit this prefix on the target.

  Qt libraries:
    $ARCH/usr/lib/libQt*.so*   (libQt*.so.4 on targets with no symlink...