kancho, like time pass said, you can do internships in CPT as many times as you want as long as the total llength of time is less than 12 months. i'm doing an internship at the moment and it's under CPT. i'll do one more next summer too. it's not like you have to use all time alloted for CPT at once. also, it's same for all students regardless of which college/university you study at.
and you can do OPT after you graduate, time for OPT varies depending on your major. if you are in the lifesciences, i think you can work in OPT for as long as 29 months.