Hi, they are all ISO's. Chocobo's Dungeon is a Wii game, I think it's full title is Final Fantasy Fables: chocobo's dungeon. It did come out on the PS1 and DS as well so maybe thats what you are thinking of.
In anycase they are all working brill now, I've put 50 hours + into MH Tri with no probs so all is well!
Yeah! I have the same problem, but I don't think it's a bad ISO, 'cos when one of the ISO's stopped working and the other did (Skii and Skateboard + Silent Hill: Shattered ...)
I had to reformat the partition (to WBFS) so I could've get my HDD space back. I do it again and it turns out Shattered Memories showz up but skii and snowboard doesn't. I think it has to do with the wire or something...