How to install QT4 in VM? It's very easy, download QT 4.4.3 from Trolltech website. Unpack all sources files in your VM (yes, you need space, something like 3GO) and do :
$> ./configure
$>gmake
$>gmake install
Now add the QT bin path in your path ($> setenv PATH '/usr/local/Trolltech/Qt-4.4.3/lib/:'$PATH ) and you can use QT ($>assistant for more informations)