Question: I have winXP LibreOffice and MS office installed.

How do I make LibreOffice the default opening program for all of its know document types?
I know that I can change one extension at a time. But is there a way to change all of them?

I want LibreOffice to open .doc .xls and ... (I do not know all of them)

Answer: 
from [here](http://user.services.openoffice.org/en/forum/viewtopic.php?f=15&t=42104):

please try a 'Custom Setup', see  

→ Installation of LibreOffice 3.3 on Windows  

<http://www.libreoffice.org/get-help/installation/windows/>  

especially:  

- Dialog Box #6: Choice of Typical or Custom Installation  

- Dialog Box #8: Choice for File Type Associations 

You may start from 'Add or Remove Programs' > 'LibreOffice...' > 'Modify',  

or  

(unpacked \*.exe file) 'libreoffice33.msi' > right-click 'Install' > 'Modify'.
'Modify' worked for me. Thanks!

On Windows Vista:

* click START
* Settings
* Control Panel
* Programs
* Programs and Features
* Uninstall a Program
* Select the right program from the list
* click 'change'
* follow instructions.