How To Create A Brochure Using Open Office

I tried the template listed under this thread.
The brochure ran off page by at least 1/8 inch on an 8.5x11 Letter printed on an HP PhotoSmart 2750 series.

So I started from scratch.

I tried to create a Letter Landscape document, and I created three columns.
I've turned page borders on, which allowed me to notice a problem during printing -- when I manually duplex during printing, there is a shift from front to back (holding the page to the light, I see a shift between 3/4 inch and 1 inch ).
I've tried changing the Left Margin to make the left margin meet the right margin on the back, with no success.

SideBar --

It might be that the HP printer settings are also to blame.
Are there standard settings for landscape manual duplex printing on an HP PhotoSmart?
I determined that I do want "Preserve Layout" ON ( I think )... at least through initial testing.
Which forum/topic would I address with questions about "HP PhotoSmart settings for OoO"?

1) If I were to start from scratch, like I did... not using a pre-defined template... just "Untitled 1"... How do I create a tri-fold brochure?

In thinking through this, a landscape page with an 11inch width, with a 1 inch left and right margin, would leave 9 inches,
which would simply make three 3-inch column brochure pages.
Landscape Pg1, Three Columns -
The first column on page one would be Page ?3? or the page that you see when you open the front page.
The second column on page one would be the back page (?6?) or the page that you see on the back when the brochure is completely folded.
The third column on page one would be the front page or the page that you see on the front when the brochure is completely folded.
Landscape Pg2, Three Columns -
The first column on page two would be Page ?2? or the page behind the front page that you see on the far left you open the brochure.
The second column on page two would be Page ?4? or the page in the center of the completely opened brochure.
The third column on page two would be Page ?5? or the page that you see on the far right when the brochure is completely open.
Fill it In
Now, I just have to fill Pages 2,3,4,and 5 with teasing information, fill the front page with an overview, and empty the back page for business name and phone number... or maybe a checklist of questions to ask before calling... maybe.
Oops!
Now, I just have to line up the duplex printing, through margins or printer options...

Oh, HELP!

2) In Print options, there is a "Brochure" checkbox.

I am seeing no use at current for this "Brochure" option.
The ? help and the OoO help system information about the brochure checkbox does not describe anything helpful for a trifold brochure.

How would this option help me in printing a trifold brochure, or does it?

Thank you for your help.