Thanks for the reply.
I know how to turn pre-season games on or off, I'm just curious if pre-season games can mess up a franchise or freeze the game an insane amount of times when using an updated roster/franchise file such as GR18, FNG, JSOU, etc.
So if I try running multiple seasons in, lets say JSOU 2008-2009 roster and franchise files, I would get weird rookie names and such? Would other problems arise as well?