Help required in deploying window based qt application on non qt environment windows

[schnitzel]

From my experience they must be inserted into system32 directory.

This is not needed. You just have to put them in the same folder where the application executable resides.

in short, you need to deploy your app as follows:
<app>.exe
<dlls mentioned by kornicameister>
if you are using icons, then you need to create a subfolder 'imageformats' and within it, qico4.dll. If you use any other image formats, add addiontial dlls to this subfolder.
if your app uses sql, then create a subfolder 'sqldrivers' and in it the appropriate dll according to the db you are using. Look at <Qt Install folder>\qt\plugins\sqldrivers

in addition to the wiki link, I would suggest the following:
http://doc.qt.nokia.com/latest/deployment.html

[kornicameister]

This is not needed. You just have to put them in the same folder where the application executable resides.

in short, you need to deploy your app as follows:
<app>.exe
<dlls mentioned by kornicameister>
if you are using icons, then you need to create a subfolder 'imageformats' and within it, qico4.dll. If you use any other image formats, add addiontial dlls to this subfolder.
if your app uses sql, then create a subfolder 'sqldrivers' and in it the appropriate dll according to the db you are using. Look at <Qt Install folder>\qt\plugins\sqldrivers

in addition to the wiki link, I would suggest the following:
http://doc.qt.nokia.com/latest/deployment.html

and than I learnt something as well