First you need to upgrade to 3.52 M33, following this guide: Click Me!!
After you've successfully upgraded to 3.52 M33, download this patch and update to it: Click Me!!
Finally, what you requested, to upgrade to 3.71 M33: Click Me!!
I would recommend you to update this patch: Click Me!!
And patch 1.5 kernel, since the original 3.71 M33 is lack of 1.5 kernel. Go to this page and download the 1.5 Kernel Patcher: Click Me!!
hi dennis how r u doing....
i need help from u.
My PSP is Ta o82 -3.40 OE-A
Can i use these what u had posted to upgrade my PSP without brick.
Please Help
Shahaed or Ronnie