Sit , u have to replace them like fam1 , fam2 & fam3 That's what I did.
Then u have to change the name of one u want to replace to , fam1 , fam2 & fam3.
After that u rome the original fam1 , fam2 , fam3 and then u go to command >> add ,
And u add the mod skin wich one u set fam1 , fam2 and fam3.
Then do command >> rebuild archive and u are done!
Regards .