By default, documents in OpenOffice are saved automatically as SXW files, not DOC files. To change this, open Text Document and go to Tools > Options. Expand Load/Save, go to General, and under “Standard file format“, change the “Always Save As” dropdown box to one of the Microsoft Word formats (whichever one would be the earliest version you work with). It stinks that Microsoft Word doesn’t read SXW files, because DOC files are larger than SXW files.
A friend just asked told me that a document she sent to herself wouldn’t open on another computer for this reason, so I’ll have to change that setting for her. Apparently, she’s not liking OpenOffice that much. On the other hand, I’m doing just fine with it. I actually used the Drawing program to create a offense template for coaching, so that was actually really cool.