Standard vs. ME?

I have a question. I have seen a few EMUs provided in the downloads where you have the option of getting the Standard or ME. I was wondering if someone could tell me the difference between the two. So I can learn which one to get for my phat CFW 3.90 M33-2 PSP. Thanks in advance.

anyone?

i believe the standard is the one that you need. i asked this question a while ago and people told me to get the Standard, ME means media engine.