lipo balancer q?

Taken from Serum's link in his post (under "Metering And Balancing")...

"If you have any doubts of your ability to meter and re-balance cells then locate someone who can do it for you. "

hmmmm - how often does balancing need to be done, and what is needed to be known by a user, to go about balancing a pack??

Is there much difference in balancing nimh and lipo cells? I assume the balancer is just a plug in feature kinda similar to the PCM?
Any pics of a pack being balanced by chance? (i wasn't sure on the PCM till i saw the diagram in the linked article - so this pic couldn't hurt for explanations sake i guess? -lol-)

Sorry for all the questions - newbie needs help - at least i was on topic? -lol-