Many ways to skin a cat as they say! There you go, a couple of methods to carry out the task. Personally I would most likely remove the plenum to gain access. I like to see what I'm doing especially when it comes to changing spark plugs, no second chances if you cross-thread them, doesn't take much.
The OE plugs have a good service life, I think they should be changed around the 40k mark if my memory serves me right. However mine have passed this mark and could do with a new set. The zed still purrs but the economy might improve slightly if I were to change them.
The 'How To' is a large file, but was uploaded to the 'other' forum, and yes I am there most of time, I'm one of the site owners over there
