How do you get the hidden script on the first stage. Also is there any cheat codes for this game.

There is a lever in one of the pools, and you run into it and the switch goes up, leave the pool and the garage door will be open. Go through the door, and there will be 3 mounds you can jump off of. The mound closest to the door is the one you want to jump off, and try to land through the window which you can see from the ground, then you just grind the pipe, and you will get the cover. Kind of crappy directions I suck at telling people how to do stuff.