I explain step by step:
1 / You create a txt file (in Fifa14 folder), with the following contents:
data/sceneassets/accesory/accessory_14_0.rx3
And run the installer moddingway (ModdingWayInstaller.exe)
2 / For every player you want to put the sock, you duplicate the file that I attached called
specificaccessory_20801_243_14_textures.rx3 changing the id of the player and the team concerned. For example:
specificaccessory_
20801_
243_14_textures.rx3
Ronaldo Id:
20801
Real Madrid id:
243
Finally, to check the id of each player, you can do it with the "FIFA 14 MWM Selector" ModdingWay patch, and the id of each team:
Here