Great minds think alike sir!
Alright I don't know what I was thinking before but you're absolutely right. Editing rosters in GD 2004 is impossible! Seems you can create basic players in the NFL roster but only upto 40 new ones... "Create player" is one option plus "create superstar" (a player with good stats?) but you can't actually edit the numbers! Other than that you can create a handful of new teams from scratch of course but then it won't be NFL...
Maybe I'll just create a few key players and release some from the default roster, better than nothing I guess.
But wait! Did you see there is a "download roster" (press start) option from the internets on the main menu... so I'm thinking this special network downloaded roster has to be be in a different format all of its own (as opposed to the "game data" save type on the memory card). Somebody out there has to have one of those old official rosters on a memory card, probably in a garage or in a dusty drawer... so near yet so far... aargh!
I doubt those downloaded official rosters would be editable but hey, I don't see why they wouldn't be able to be hex edited, maybe ...if someone had the passion and will to do it.. for this game? probably not haha!
Man... it'd still be sweet if someone could share that elusive old official roster file anyway, it'd be at least a starting point to work with...
...anyone?
PS: I'm with you 100% on those other games man, funny you mentioned Arena Football.. I never got around to the series before but I was looking around for it a couple of weeks ago but got distracted (I had old Amiga Speedball 2 Brutal Deluxe on my mind) so thanks for the reminder!