If I'm misunderstanding your approach ignore the following...
The problem is, since this is for the PS3, you can't have more than one person doing rosters at the same time to try to speed things up. Its one save file for all 32 teams. They can't be combined.
what you would need to do is have one starting point, your save file with all the correct uniforms and endzones...and then pass that along to someone else....then when you get it back, you can go in (and remember to delete Greathouse patch) and fix stuff if you feel.....then send it out again.
That is why it is just better work on it on your own, or let a roster guru do everything else....right after you feel you are done with the uniforms and endzone.
now supposedly there will be a device released for the PS3 in the first week of July that lets you edit saves (HEX style, like the 360).
http://kotaku.com/5914704/a-modern+d...-maximum-lives
if we can get Finn to get his BackBreaker editor to work with a PS3 code as well...(as he did for us for NFL 2k5 for the PS2) then everything would be MUCH easier for you.
love your work!