We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Creating my own template in OpenOffice?
I've downloaded LuLu's 6x9 templates, but after reading through the style guide, I'm thinking it will be easier to recreate my own, in OpenOffice (and once my manuscript is finished, I'll save it in Microsoft Word format).
Does the Lulu.com site have detailed written descriptions of the default templates available (margins, size of the gutter, etc.), so I can recreate them as I go?