"Copy" a player

Hello,
I wanted to ask if there is a way to "copy" a player?
I want to create a national team, lets say Israel for example, so how can i "copy" Omri Casspi from the KINGS to the Israeli national team also?
Thanks, and sorry for my bad knowledge and English !

when you use the in game create a team feature, it automatically copies the players on to your created team without taking them off their original teams

I know that, but there is any way of doing that whith a non created team?
If not, can I change the Uniform of the created team?
Thanks!

you can do whatever you want if you edit the roster with REDitor, including having players assigned to more than one team.

Ok.. Thanks..
Can you tell me how to do that pls?
Thanks!

Can someone tell me how to assign a player to two teams?
Please it is important!

unfortunately this proves that you haven't even bothered looking yourself because having TeamID1, TeamID2, TeamID3 fields in the players tab of the REDitor isn't obvious enough.

Modding can't be done through me, you need to spend some time looking at the tools and messing around with them, experiment a little bit, that is how you learn.