Spark Plug Change in a Truck--How Hard Can it Be? Update#2

So the old plugs were these which are their platinum "series" but are "iridium/platinum" too.

http://www.stylintrucks.com/parts/ngk_laser_platinum_spark_plug_-_pztr5a-15/23870/ngkng7862-.aspx

The new plug is "iridium enhanced" but also "platinum" Not too confusing! Anyway the truck runs on either plug whatever they are made of.

http://www.amazon.ca/Autolite-XP5245-Iridium-Spark-Plug/dp/B000ET5TFI