Well just use the newest version of Despertar Cementerio. Which is Despertar_cementerio3 ( Pandora 3 ). It will directly update your PSP to 3.71M33-2 through Pandora. So until they release an updated version you'll need to update the PSP to 3.71M33-3 through the XMB with the updater. You will need to do the same with the V.2 1.50 Add-on.
That's your safest and best bet but you could look into all those unofficial release that supposedly add more options and features.
Here I'll upload everything you need..
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