NO!! UDF and Trachy are wrong! Well, actually Trachy is right, but these events are all for Pokemon Ranger- Tracks of Light only, NOT platinum. It's a real bummer :(
I was hoping to get them on my HG, but all 4 are for Tracks of Light. It says the game that they're available through on Serebii, so look at that before attempting a download.
Or just watch for it to be listed on Pokemondb here.
We don't have any Pokemon Ranger events, so if you see an event here, you'll know it's an event for D/P/PT/HG/SS/B/W.