After several iterations, I've created my own Ultimate 2K5 Coach Mode package and maybe you'll enjoy it as well. It includes a current roster with attributes adjusted all over to work with coach mode, a MobileQB offense excluding plays that don't work in Coach Mode like many bootlegs, a maxed out West Coast Offense and a Settings save file.
All saves are in .psu format to work with PCSX2.
This game was not designed to be played in coach mode but, hopefully this setup will allow you to enjoy it that way. Don't pay too much attention to the attribute numbers, they're going to look weird, and focus on the gameplay itself. There will be some trade-offs like dumb DBs so you don't have 4-5 interceptions every game. You'll still throw plenty and get the same.
Take care and good luck out there.