How can I enter codes on the action replay for gamecube?

So I just got my Action Replay it's the second version, and I want to enter codes for Twilight Princess, but I can't find where I can enter the codes. Where can I find it? Do I need another memory card or something? cause the ones I have are full.

Datel for some unknown reason have made it impossible to update it by removing the feature to add any new codes or add any new games to the cheat list.

And the selection of codes that are on it aren't exactly that great either. You get codes like 'Infinite Health', etc but there are hardly any codes that make the games more interesting.