How can I go from a RPN to a RN?

Hi, I am currently awaiting my admission for college, i started kinda late because i took a year off, I am going to enter the Practical Nursing Program, but I would really want to pursue the RN(BSCN) career. Right now I have 4 oac's, and only need two more, that's if i wanted to enter the BSCN program this Sept 2004. Obviously not, because i believe that i wasted too much time and that i should sign up for the RPN this winter ASAP. My question to you all is how can I go from a RPN to a RN with a BSCN degree, without having all 6 oac's to begin with. Because if i was to go back to university they would ask for my original 6 oac's right, but like i've already stated i have only 4. So is there any type of program or Reach ahead programs, may include the USA also, that can help me get my RN (BSCN) shortly after completing the RPN program. This means taking exams or extra stuff to getting the RN.

Thank you for your time and patience, it was well-appreciated.