Offhand, I would imagine it would be helpful to have Word; That said, I'm on a Mac and I use OpenOffice, a free word processing program that will open Word documents: http://www.openoffice.org/product/mac.html
You might want to post this question in the writer's forum - they'd have a better handle on this than I do.
I still have Word 2007 from the glory days of Microsoft Technet registration IIRC...man I even forget the name for it but it was awesome cuz you could download anything for $1200/year SWEET. I had so many cool things like SQL Enterprise that costs an arm and a leg for licensing.
I'ma upgrade to the latest probably this year though.