OSPF area 0

Hello friends,
i have a questions that i want to clear up.

if in the lab ospf area 0 is not given, instead area 0.0.0.0 is given. then
what should be done. In IE i saw one such lab, in which there was no area 0.
so what they did in the solution is that they created a tunnel and assigned
in to area0. Should one take the same approach in lab, even if there is a
restriction on using additional ip address other then indicated in the lab.

-- 
Khurram Noor
Internetwork Professional
Blogs and organic groups at http://www.ccie.net