Input sirius-DJ on the cheat menu to play as Jason Ellis.
grindXpert - Perfect Grind
2wheels! - Perfect Manual

Ever notice that in every Tony Hawks game there were people messing with goats? In Wasteland you'll find the goat scene in Hollywood. Go to where the skate shop is in Hollywood. Skate up the QP to the left and into the pool. Then grind or grab onto the third rail, going left. Jump onto a little corner and bash the crack wall with your board. You will find the goat on the bed and a oil rig worker.

Go to the middle of the grassy area and locate the smallest tree there. A light post stands near it. Make your skater graze the tree and it will fall onto the wall and reveal a secret area.