Docx converter?

whats a good one?

I am trying to view word 2007 files with 2003

Pirate Office 2007.

I just want to open 1 file

there is a conversion tool from MS that should download automatically when you try to open a docx

http://www.microsoft.com/downloads/details.aspx?FamilyId=941b3470-3ae9-4aee-8f43-c6bb74cd1466&displaylang=en