Multiple layout section override ?

I am aware that i can use macros for layouting, for example, a main layout
that contains header, left body section, center body section, footer.

Based on the examples i have googled, like this one here
http://wendefer.blogspot.com/2007/09/handy-tip-for-layouts-in-freemarker.html,
i can use <#nested> in the main layout for dynamic values for other
templates that use this main layout macro.

But in my case, i would like the other templates to be able to 'override'
more than 1 <#nested>, for example, providing the content of left body
section -and- center body section (like apache tiles).

Is this supported, or maybe is there any other approaches to do this ?

-- 
Do not pursue the past. Do not lose yourself in the future.
The past no longer is. The future has not yet come.
Looking deeply at life as it is in the very here and now,
the practitioner dwells in stability and freedom.
(Thich Nhat Hanh)

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