First, the latest version of Qt is 4.4.3.
After you have installed Qt you should find a new entry in the start menu, in it you will find a link to "Qt Command Prompt". This will start a shell with the environment all set up to compile Qt applications.
You can put the file in any folder you want, then go to the command prompt and change to that folder. There you have to type
as is said in the tutorial. The created .exe will be placed somewhere below the folder you are in, depending on what was specified in the .pro file.qmake -project
qmake
make
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