The dilemma!

Hi,
I am in a bit of a dilemma. I have four papers left(p2 p3 p4 p5).. I was thinking of attempting all four exams but due to some circumstances i couldn’t prepare at all. I have been thinking of dropping any of p4 and p5. I am more leaning towards dropping p5 but I am worried about the changes in the june 2011 exams. I am already taking classes of p5. Will these lectures become useless for me in june 2011. I plan on giving this paper with self study in the next attempt. So please advise me what should I do? Are the changes significant enough to have an impact?

Thank you.