This one is very very commonly requested.. bascially everytime Evony runs a holiday promo. Copy and paste this script into the script window of any alt in your alt alliance, click run. It will output an addfriend xxx line for each member in the alliance into your log window below. You can then copy the outputted script and share it with your alliancemates/friends so that they can add your alts before coining.
// compliments of Sericom, I think command "members" echo $result.replace(/"([^"]+).+/gm, "addfriend $1").split("\n").splice(1).join("\n")
If you'd like to clear your friendslist first, in order to remove people that have quit/sold, you can run this one first on your main:
execute "removefriend " + player.friendBeansArray[0].userName if player.friendBeansArray.length > 0 loop
Please note both scripts can take awhile to complete running if you have a lot of people to add or remove.