is teh factory supercharged inline 4

No such animal in the states.

The only factory supercharged engine came in 2002-2004 Frontiers and Xterras, and it was a VG33 V6 factory rated at about 210hp.

some retard i worked with said that there was a pickup made 4cylinder with a supercharger

Aside from the 3.3L V6 equipped Xterra and Frontier SC's(SuperCharged) made from 2001-2004, the only other production vehicle Nissan ever supercharged was the Nissan March (AKA Nissan Micra).

It had a Supercharger and a Turbo in the engine configuration and the little beastie was fast. They were only sold overseas and a few have made their way to North America through the import export activities. The premise of the engines design only lasted a few years. But what a wicked little car.

But Desert Rat is correct. Nissan NEVER made a 4cylinder truck with a supercharger. BUT there is a possibility that someone made one on their own. Tell your source to prove it...if he can that is.