How to Install ChickHEN R2 on a PSP 3000 correctly
This video provides instructions on how to install ChickHEN R2 onto a PSP 3000. Once you do this, you will be able to do some neat stuff with your PSP (such as playing Homebrew).
It can take a bit of time to get ChickHEN to boot once it's installed as it's randomized. Keep trying if you do not get it the first time.