Maybe I did something wrong, but I added the folders to the textures folder (had to rename se to se2, because another mod had se as a folders name). I replaced and changed the name of the csv file and added them manually.
So - just make sure you also change all of the ".png" file names to include se2 as well and not just the objmap.csv hashcodes or else Selphie won't show up.
I ran into this same issue - and everything would be corrected if we renamed the files to ch_sqhead_13.png, etc. If we add a suffix beforehand, we can put all of the character folders in the same place and it won't have to interfere with any other mods - this is how I handled filestructures for the worldmap.
Currently, Project Eden takes up the "se" folder and if you merge the folders, it works, but it makes it really messy - as the Selphie textures are then found intermittently in the Project Eden textures folder location.
I have changed all of the objmap codes and my .png's to include the "ch_" title and everything is nice and tidy.
Can you talk to your party members in the Balamb Garden c*ckpit? I remember them being 'static' there, though can't say for sure. Try talking to them elsewhere just to be sure.
Edit: We're censoring c*ckpit now apparently.
I agree, I don't think you're supposed to be able to chat with them in that scene.
PS. c*ckpit wasn't dirty until it was censored.
Now it's more fun to say than ever.