Sounds like perhaps you neglected to check the proper boxes for file associations during the Open Office install.
You also seem to have the .doc file extension associated now with acrobat reader.
You'll need to change this.
Click the start orb and type
default programs
into the search box and hit enter
Select the link that says
Associate a file type or protocol with a program
after it loads find the .doc file extension
select it and choose
Change program button, top right
if open office writer is not available as a choice click the browse button and navigate to the open office installation and find the executeable for the writer program and select it, make sure the box "Always use" is selected and click OK.
Should work now.