I want to know how to fix this script for groups please help?

I need help i have found a expertly scripted leaderboard GUI but i want it to automaticly give people in a group the image? the root value is

ADMINS = {
	(name here) = "(decal link here)"

would i do somthing like

ADMINS = {Plyr.OnEnter:IsInGroup(IDHERE) = DECALHERE

you guys have any ideas on how to fix it????