Apply on-line, but follow up within a couple days to all the colleges and speak to the admissions people and tell them your situation. They are pretty understanding and some will even expedite the process for you and throw you application on top of the pile. After the application, they all will want your official high school transcripts and some want ACT/SAT test scores.. so I would get in contact with each admission department and stay ahead of the game.
99.9% of the time you get to go to the school you want.. but don't risk it.. It is a race from this point on.
Also a little hint.. don't send acceptance letters and degree plans from all the school to CNET (Ed Straten).. only send the 1 school you really want to go to. If CNET has a problem sending you there, they will let you know pretty quick and THEN you can cough up the other acceptance letters. =) Best of luck.