Add Library Components On Proteus

Hello,

I am a newbie guy on dray electronic stuff and I am using the proteus version 8.5 to draw a basic schematic. This schematic has various components, and one of them it is a led, the basic led. I can find the led-green and use them to simulate my schematic. By when I need this component to Ares Proteus I can't use them because this led-green haven't pcb package.

How and where can I learn to add library about components on proteus. A bit like we do on Autocad with many components. Is it possible on Proteus?

Thanks