Windows file type registration for OOo 3.0 Beta for Windows

Just installed the latest OpenOffice.org 3.0 build over the previous one, and all the Windows Explorer integration was lost.
I googled around a bit, and found this on GullFOSS:

"If you test the OpenOffice.org 3.0 Beta on the Windows platform, you might be wondered about the missing system integration. Well, we decided to avoid the system integration in the Windows registry, because it conflicts with an existing system integration of an OOo 2.x, that you are probably using for your daily work. But if you know, what you do, you can of course get the complete system integration for your Beta tests. You only have to set the global property WRITE_REGISTRY, that is used as condition in the Windows Installer database. So please use

setup.exe WRITE_REGISTRY=1

or if you prefer the direct call with Windows Installer service:

msiexec.exe /i WRITE_REGISTRY=1"

I reinstalled with setup.exe WRITE_REGISTRY=1 as stated above and it worked like a charme.