So here's (kinda) an answer 3 years later. If you're still having trouble with this... (sorry, just saw this post!)
I am just picking this game back up. It's been a couple years or so... I don't have any of my original files, as everything was corrupted. I also have to figure out how I did it, but I also figured out how to get Michigan to play ohio at the end of the season. There was something weird in the original file that I could not get to change using MS Access. Other teams I was able to change. So I set up a completely new Big Ten with info from the teams copied, but the ID # was different. I was then able to set the rivalry and the week it is played. Will have to figure out all over again exactly how to do it as I build anew.
Why did I stop playing? Got an error that I would get fairly often, so I knew I needed to back everything up or risk losing it all. I got the perfect running back. He wasn't highly rated where he looked like he would be exciting, but he was strong & like 99 endurance. When he went in the game he just rolled through everyone. Never got tired. I was genuinely in love with this player. He was the RB I always wanted, but would never get. Then... the error. Last backup was before he was generated. Then I had to wipe the computer because of something else & the game wouldn't install on the refreshed computer. (I finally got it to install on a laptop I almost never use. So I'm back... and in search of that perfect RB!)