Question| Where can I download (the latest) DOSBox for PSP and how to "install" it

I've searched for it pretty much and didn't find a normal download of -it- and an explanation of how to install it on the PSP, only a thread with many links and no explanation that none of theme is being called the DOSBox.

And I've also saw for example a video that shows how the PSP can play Heroes of Might & Magic, so I want a version which has this "windows abilities" (or that it's a patch for the DOSBox or something like that?).

Thanks in advance.

*And it needs to be for the PSP Slim