[cogknifey]

Don't do the cog trick unless your using Action replay disc to boot with ,this because the AR stops the disc allowing you to swap.
It sounds like the disc is still spinning ,thats why it sounds like a motorbike .
When you close the draw you must engage the cog to lock it

Your still need a mod chip, for a detailed way of booting using the cog knife trick check my last couple of posts

Do this at your own risk

Good luck