I got it working, yesterday I may have been too tired when I checked this SO post: http://stackoverflow.com/questions/15974056/setup-iredmail-admin-site-in-nginx-on-ubuntu-12-04.
I didn't realize the guy used a different package from the chinese guide so I assumed it was a customized (for OpenSSL) version of the chinese one, but it actually has a couple of fixes that'll make it work.
Just following the SO post didn't make it work though, first, I found out that uwsgi-python is now used as uwsgi-plugin-python, so I used the install from the post, creating another directories made it not work for me, so don't bother changing them, keep the at /usr/bin/apache2/ if there's where they got installed, I didn't use the config file from that post, I used the chinese one but changed the uwsgi_pass for the one at hte SO post, which is where the uwsgi application runs on the current uwsgi installation.
Sorry if it's not really clear what I did for me to get it working, I may do a guide later and link it here, since there's no markdown for this post (or it doesn't seems to at least).
Cheers.