There is an old saying that goes, "When all else fails, read the documentation." So let me inform you about Qt's excellent documentation. You should have no problem after consulting them.
There is an very good book about using Qt called "C++ GUI Programming with Qt 4". I highly recommend it. It even includes an appendix on building and installing Qt 4.
Qt itself comes with very good documentation. This can be accessed online at http://doc.trolltech.com/4.2/index.html, or from Qt's included utility, Assistant.
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