DS needs help to get started with Pokemon Heartgold on his DS

[flier]

Can anyone help?

He has caught 3 pokemon but it says he needs to put one in his pc box to be able to use it with his pokewalker. how on earth do we put one into his pc box? I'm sure this is a really stupid question, but I can't for the life of me find where on earth this pc box is!

My ds says:
First go to the pokemon centre, in the game.
Next to nurse Joy, you will see a pc on the counter.
Click on the pc and it will boot up, then click on 'someone's pc'.
Deposit pokemon.
Go to main menu and then you can transfer pokemon to poke walker.

Apparently. I don't understand this either!?

hth.

Thanks very much Patsystone, will tell DS or try to do it myself, Was googling like mad last night and could understand nothing I read about the pokemon, it all seems very complicated!