The .bic files are stored in the same folder as the regular NWN created .bic files. If you're not seeing them there, I'm not sure what to say... the game sees them if I read your post right, so they must be there.
The folder is a subfolder off of the main NWN folder. It's like the "module" folder contains third party modules, and the "hak" folder contains .hak files. I don't remember the name of the folder, but it's probably either "bic" or "characters" or something to that effect.