just a heads up to check the jersey file name options
some jerseys are in the game but the data and file names are not inside the SYNC.BIN roster file

you can add jerseys/unifroms to the end of the list by just continuing the pattern and making new ones at the end so write them in if you want to
but to make them go along with a team make sure you go to the team data and have the address for that jersey/uniform
also the uniformdata for a specific uniform starts -8bytes from the name of the file to account for the customuniformdata
see in this picture how I use the address of where "All Bytes" and "Custom Uniform Data" and not the address of the name of the file

u001mil_current_christmas

u001mil_current_hwc

if you use up those jersey slots and think how do I add even more well just look at the pattern HH has "+140*270" in the address box and GG had "+140*260"
go ahead and make II or name it whatever you want but copy and paste HH then change the copy to have an address of "+140*280"
JJ "+140*290"
KK "+140*2A0"
LL "+140*2B0"
etc