For the second point, on the dcemu site and click on psp on the top. When you scroll down, look along the left side and you will see a list of homebrew games. Depending on your fw, go to
http://www.noobz.eu and look around to find all working eboots. Things that can go wrong is getting you psp bricked, but you can use psafep, a program for scanning EBOOT.PBP files to make sure that they have nothing that can harm your psp. Downloading eboots from dcemu or fanjita's site will make sure that you get EBOOTs that will not harm your psp.
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