A shot at Ernst and Young career?

I have about a year of pension auditing experience since graduating and I also want to work at Ernst and Young. I had mediocre grades in college and wanted to know if there is any chance of me getting hired anytime soon? I will not give up until I am in a big 4. Even if it takes me another 5 years. Please give me details. I need some inside information from current or past employees. What would you do in my situation?