you might include them as supporting imagery for the main photographs. i wouldn't make them the centerpiece of a page.

you don't just say "i built that"?  i've heard that a lot recently

if you wanted, i think it's fair to give credit to the organization you were working with and say you were part of the group and maybe provide something that suggests what your role was and/or the size of the group.  defining your role could get wordy, so if this is only a portfolio you may want to keep it vague, but if your application involves some sort of written statement that could be appropriate.  i don't think it's common to list names of everyone involved, but i'm sure it's fine to do so.  the application committee is interested in you, not in some guy you know that you once worked with.  also, i'm pretty sure the guy you worked with will not have any copyright claims to work they did.  the same should generally apply to gals you worked with.

same thing about cad files or whatever.  if you think the image helps you, go ahead and add it.  i don't think you have to give credit to the human being, just try to not make it look like you did something you didn't.  maybe say something to the effect 'these are the working drawings we built off, provided by xx organization.'

Project name, description (if necessary), your role on the project.

Doesn't need to be any more complicated than that.

I always found it common practice to list the name of the office, parter in charge / project leader, and all team members. A short description of your role would suffice, and credit all images not created by you.

I think it's also nice when it goes the other way too. i.e.. when the project leader also credits the team in his portfolio. Obviously the situation is different, as it's assumed that any project leader would have at least a couple designers supporting the project, but it's still a good practice.