Not to hijack the thread, but that is tough. It's along the same order of having to put all the slow guys on the kick coverage just to get normal typical runbacks without cheesing the AI.
I think for the DB's it will take some experimenting between attributes in the coverage, consistency, aggression, catching (0) areas and then tweaking the coverage sliders (with INT @ 0).
GL w/ the 2K4 roster. I still have the game install on my Xbox and would surely give it a go!