I tried this. Exported the teams and was not able to edit them anywhere within the game. This is why an external editor is so vital for the continuation of this game on the ps2. It would make roster editors jobs so easy. I don't know about you guys, but I'm willing to pay for someone to create one. I've got a franchise going on in Madden, reporting it at several forums - and at the moment I dont' have the willpower to play it, I put alot into it, but now I'm just disgusted by the site of Madden.
We can make this game as up to date as possible, we just have to find the right people to do so - wish the xbox editors would figure out a way to either convert their files or oblige to making a ps2 only editor.