Custom Jerseys

In last years game if you chose expansion, both teams you chose to view/play as do not have custom jerseys. Even by creating and add a jersey fitting the dimensions of the existing ones (260x190) and matching the name format (eg RW_NBA_FIRST_LAST.png - if you use the mod naming style), they do not appear. This is the exact same in this years game, instead they appear as below:
and 
As much as I like to see the shirts v skins style basketball make it to the big leagues, can we please get a fix or a workaround or a step by step guide on how to add custom jerseys so they appear?


As much as I like to see the shirts v skins style basketball make it to the big leagues, can we please get a fix or a workaround or a step by step guide on how to add custom jerseys so they appear?