In a mixer grinder, grind the biscuit, add melted butter and mix well.
Now press the biscuit crumbs into 8" springform pan and refrigerate for 30-40mins or until firm.
In a bowl beat the cream cheese until soft, add lime juice and mix well.
In another bowl whip the cream, add powdered sugar and whip until stiff peak form.
Add the cream cheese mixture to whipped cream and mix well using a flexible spatula.
Pour the entire mixture into the sprinform pan and chill for 4-6 hours or overnight.