Reading this forum, the most important thing is to stay away from Qt5 (under development) and make do with Qt4 (stable).
Haven't done this myself (yet), but found this: http://install-climber.blogspot.ie/2011 ... -5-or.html
...as far as I understand, should work for Raspbian (Step 1. either open LXTerminal or don't start X at all).
Hope this helps!
http://raspberrycompote.blogspot.com/ - Low-level graphics and 'Coding Gold Dust'