No, you must use only cards that are listed in your franchise's players. When I finish putting the set together, you will be able to just select team tab for players available and a full list of available players will be shown.
I have been working on this for hours now. I have to download the ATG9 file and delete each player that doesnt fit our format one by one.
For the first season, just to move it along, we will just go to ATG 9 and under available players you will select "Team". Then choose your team-exp (in my case California-exp. Then the entire list of eligible players will be listed for you.
http://365.strat-o-matic.com/member/acceptinvite/TNHCK