Yep fit them up myself... and read through the same DIY guide a while ago... before I purchased the ep3. Yeah its a pretty standard/straight forward plug change really.

Only thing to look out for would be the nut/bolt connecting coil pack ignitors 2 & 4, you'll need a 10mm deep socket to get them off or a ring spanner should work too.

I use permatex anti-seize lubricant on my plugs as well, not really required but it makes it easier to get in and out when changing the plugs... I use it on pretty much all my bolts (anything that I undo on a regular basis).