Can't figure out how to use sleeved jerseys

Hello.

Sorry if this was already asked, but i can't figure out how to use sleeved jersey with red MC editor.

I mean, i tried to check what is this number to change on roster.iff or jersey tab to make the sleeved jerseys available in game but it didnt work, even though i'm using sleeved jerseys they appear like normal ones.

If someones kind enough to help me where i could be wrong that would be fantastic.

Thanks in advance.

Jersey tab ---> JModel ---> 7 or 8

i'll try that once at home, thanks buddy.

one more question if you don't mind : is there any other way to change this setting since i really want to try sleeved jerseys? and does this work for every mode or only association?