XSL-FO impagination columns

Hi!
I'm using the latest version of
Apache FOPB http://xmlgraphics.apache.org/fop/
I have a question about XSL-FO
Do you know how to make this impagination
https://docs.google.com/a/bizree.it/document/d/1Y-VpdCTj_raYbLBUyar9gh33noNNa
si7uKXjV3heRf4/edit?hl=en_GB&authkey=CLu7tMIF&pli=1
with XSL-FO?
I need 2 contents one is in orange background the other is in green
background.
The important thing is that I need to left blank the center part that
are 3 columns of 5.
(I do not need the background color, I've painted it to explain better
what I need)
If it will not be possible to make this with 2 contents.
I'll do it with only one content that starts from the orange
background text and continue into the green background text.

Can you help me?

Thanks in advance!