Any short cuts to IPv6 Summarization?

Hey team,

I am doing some practice labs and am slowly learning how to summarize IPv6.
I kind of sort of maybe think I have it now ...

Any short cuts to this?

Windows calc?
Add a bogus summary address and let the router correct you???? ...

Just a few thoughts ... anyone know a way to short cut this, or is the old
fashion "do the math" approach still the best?

I found this link helpful:
http://ccietobe.blogspot.com/2008/09/ipv6-summarizing-ospfv3-addresses.html

Your thoughts are requested! TIA,

-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net