want to do the following, perhaps some of you can tell me how to do it or at least point me in the direction of a place that can:

1. take clips of ESPN "SportsCenter" broadcasts
2. capture footage of Madden PC gameplay
3. combine the two and edit into a "fake" broadcast

basically i'm in an online football league and we use a text sim game to sim the season. i want to create custom "broadcasts" using clips of the SportsCenter show (and dubbing over the voices of the commentators using my own voice) and when it comes time to show a highlight i would then in turn use replays from my Madden PC game as the "highlights"/footage.

thanks for any of your help and assistance.