Making a movie with PC Games?

I like playing PC games,and I like making stories too. The last two weeks I was palying Operation Flashpoint for making new story. I relized that the game is full of creativity. I already have a base storyline of the moive. But I needs some human players since I'm not satisfy with the AI. Based on an othe game,Full Spectrum Warrior, there will be two squads of 10 soldiers. Both of the squads are mixed with rookies and reseved force. I expect to invite some of my girl classmates to form one of the squads. But I'm not good at talking with girls.Also the year project make us busy for nearly a year. Maybe I have to keep the plan in mind.