1. Plugins are things used for activities on the PSP, like playing MP3's in the XMB, that is concidered a plugin...
2. Yes, but they are illegal to distribute through this website, but you can find some on http://www.psp-hacks.com.
3. Nothing is a hard language, it is just if you learn it, then it becomes simple to you, although I had trouble with it.
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