OK, got QT Creator 2.0 to compile for x64. The error above points to a error in the QT Creator 2.0 source code. The error is in $QTcreator 2.0 src$\src\plugins\qmlprojectmanager\qmlproject.cpp line 104. It has
component->errorString()
which needs to be
component->errorsString()
. errorString is not a method of QDeclarativeComponent.

If I try to compile with QML support I get some more similar errors, but I was able to compile with
Qt Code: 
  1. c:\Qt\qt-4.7.0-beta1-src\bin\qmake.exe "QT_PRIVATE_HEADERS=" c:\Qt\qt-creator-2.0.0-src\qtcreator.pro
  2. nmake
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