How to get command block in Minecraft 1.5?

I know the command block first was introduced in Minecraft 1.4
I have checked the Minecraft wiki.Anyways, I'm using 1.5 because it's the only one this texture pack will work on, and I want to know how to make a command block in 1.5

Look up the code for the command block on google, then use the "give player" cheat and one will appear in your inventory.

/give 'playername' 137
Find other IDs on this site: http://minecraft-ids.grahamedgecombe.com/