Hacking PSP CFW

[flampewan]

So, I had a PSP with 3.71 M33 VSH CFW, installed an OFW (1.50) and updated with an UMD to 2.80.
Now I want to get the 6.60 firmware but I can't since I get the "drnffffffd7"
What should I do ?

Also, from 1.50 I tried to update from 2.00 with the Demo Disk but I got the same error.
Used the Killzone Liberation disc and updated to 2.80 and it worked fine.

 

[slaphappygamer]

Every thing you need is here. Check the spoilers.

 

[flampewan]

Every thing you need is here. Check the spoilers.

Already tried, I get an error with Hellcat Recovery Flasher