Please help, IO Error: Map Failed

[okugi]

Hello all. Recently, my son broke my PSP, so while I save up to by a new one, I wanted to try my games on an emulator. I have several PSP games I purchased through the Playstation Network, so I downloaded them on my computer via their portal, Media Go, used a PKG decrypter/extractor, and placed the eboot files under the ms0\psp\game\title folder. When I tried to load them, I get the message IO Error: Map Failed. I'm not sure what I'm doing wrong, and there's no FAQ here to browse through. Any help would be much appreciated. Oh, the games I was using as my first attempts were Dissidia 012 and Final Fantasy IV.

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