thanks for that link, that is what I am looking for.
So let's summarize it (because my english isn't best...)
1/ I have to wait until sony send me upgrade licence for x86
Windows 7 Home premium
2/ Than I can download x64
Windows 7 Home Premium from somewhere
3/ I do clean install without entering my upgrade licence and unchecked "active online"
4/ after installation is completed I do OPTION FREE in this(nine steps):Clean Install with a Upgrade Windows 7 Version
5/ and than I only do METHOD TWO in this:Activate Windows 7 Online
And that's THE END.
So please , if you can ensure me:
--this would be absolutely legal?
--this would work without any problems with activation?
sorry for these maybe "stupid" questions, but I want to be 100% sure