They're named differently since he was using Postality Knights, which is a different translation. However, you have all the same commands. Note the sequence of numbers to the left of each event command. I bold them in the following quotation:
1-1-1: Message- This is where you type your messages that an event will say.
1-1-2: Show Choices- This is where you can create a 2 to 4-choice based message. You can even disallow a choice here. Once you've typed the name of each choice, you will be asked to fill in the handler (condition if this selection is met). Each choice has it's own handler for the selection the character makes. For instance if you have an event that says a message like "Will you get me a potion?" and your 2 choices are Yes and no, then you must create a section for each yes and no.
1-1-3: Input Number- This is where you may store your variables. If you click on the Store in Variable box a new menu will pop up like this
That sequence is:
So, 1-2-3 would be the 3rd row of the 2nd column of the 1st page. etc. So that will correspond exactly to the command you have in that place.
The sequence for "Enemy Encounter" is 3-1-1, which is the command in the 1st row of the 1st column of the 3rd page. Go there in your event commands and you will see that it is called Battle Processing in your translation.
Do that for any event commands referenced when you're not sure to what they correspond.