05-31-2012 10:38 PM
The only thing that matters is the format you save your files in. It doesn't matter which version of Word. A .doc file is a .doc file, so either version of Word will work with the same files fine and save them the same way. I wouldn't save as .xml if I were you though. Those have a harder time converting to mobi and epub later on. Stick with the older .doc format.
And you don't have to use MS Word. LibreOffice Writer (among others) is free and will read and save in .doc format just fine.