Things You Need
1.Be Sure You Have Patapon 2 demo and i Psp version 5.03
2.You need to Download 5.03 ChickHEN and Copy that to ms0/Picture
Note that the 503 version and the original version of the ChickHEN h.bin the h.bin conflict. You can try My ChickHEN mod This allows ChickHEN and 503_kxploit coexisted.
Launch patapon 2 demo
Here's the Link