If you want to paly Alien you should follow this instruction.
Step 1: Turn the LPR up a little high. Interceptors: about 85 psi, Aliens about 125.
Step 2: Turn the HPR so its shoots about 5-10 fps above 300 (or what ever speed you need it to be at)
Step 3: Turn the LPR down until its under the fields FPS limit.
Step 4: Go "gat gat gat" and pwn newbs.
Lexus SC430 Parts