Hi there Ibej!
I'm a native portuguese speaker, so i'm an expert with portuguese language, both the european or the brazilian portuguese. I've also worked in another projects of translation. I think this proof reading should be easy to do, and i can deliver it in the following 2 days, starting tomorrow.
If you have any doubts please contact me. I can give you my skype or email if necessary.
best regards,
tintim (André)