Ok Stuff didn't went out really well here.
I did the jailbrake, the log had a bunch of errors about not finding images and in the end it flashed something (log attached).
I went then for the app2sd install, from the file rupor-enable-asec.7z. Then the reader flashed and after reboot it literally went on loop, halted at the spinning arrow. As i could not get the log for it I'm attaching a jpg of the cmd for it.
Any idea of what might have gone wrong?
Doing the app2sd after the AMR solved it for me. everything is fine now =D