Dude, I had the same problems as you.
And after I Set "Character set" to US(437). It worked just fine!
So you should try that ! ;):thumbup:
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Yep, I wasn't able to run ChickHEN either
I tried most of the things you said and yeah it never worked.
I was trying it on a friend's PSP which was a PSP slim 2010 (that number is for region code, in this case Mexico). So, it doesn't work with Mexican TA088v3 motherboards.
I asked a guy who knows more about this stuff than me (yeah i can't believe it either :p) and he told me there are Four different versions of the TA088v3 mobos and ChickHEN only works with one of them
They should be addressing the compatibility issues
Edit:
Maybe it is as simple as that, I might give it a try