unhide some players

I heard its possible to unhide Allen Iverson etc. with Leftos's roster editor, could anyone say how, if its even possible?

nvm I've found it out, how to hide/unhide players, but is it possible to acquire them [what I have edited is free agents only] in an active offline association? I mean without creating new one.

do the same thing you did to activate him in a roster, but in the association file

Thank you very much. Also, how can I find my wanted player more easier? Because now I need to search trough whole list.

searching through the list, sorry