Well the first option you mentioned is what I explained in my previous posts ...

I took your second option, by first uninstalling all Qt related stuff from my system and then did a fresh install of Nokia Qt SDK BETA, and then installed the Qt SDK with mingw as you mentioned ... Now, I noticed that Qt Creator automatically detected the Qt SDK libraries and made its necessary entries in the Tools --> Options --> Qt4 dialog box .... But still the Desktop build settings has no 'Toolchain' value ....

Any help people ?