it is possible, I was one of the first people to do it way back in the day. 2003 is a bit different. But not much. Just create the players you want save the file then go in with Toolkit "I use CDBF" Make Sure these things are in place. {for all your created players}
1. make sure {yearsexp} is 0 or leave it blank I would go with 0
2. make sure {team} is set to 39 you may ave to add {origteam} to 39 also. Not sure with 2003
3. in previous live's You neaded to have {iscreated} set to T But with creating your player it should already be set there. But if it fails try setting to F
4. Now the most important thing {isgenerate} should be set to T
any problems I will try to help but im pretty busy now a days. you can e-mail me at
jerrygildner@gtlakes.com
----Andrew---- It be a really cool feature for your rosters to have all the next year recruits

if you wanted to go to all the trouble of makeing them.
ps.... acouple bad things about this. The game will also create about 48 or so players they you have to go in and delete later {or i sapose you can keep them} And if all your players are not above a 75 overall The crap players will be drafted.