I did it the other way round: Copy the standard ubuntu cursors to the scratchbox environment (where all cursors are invisible ones by default) and then install QtCreator inside scratchbox. Log in to scratchbox and run "DISPLAY=:0 /path/to/qtcreator" and you're done. The only thing that has to be changed in QtCreator is the start commandline which should run "run-standalone.sh $yourapp" and also export the display to :2.