I am new to the n800 and i'm trying to boost the sound for mplayer. I have read a few of the threads posted by others on the topic and have made some progress.

I downloaded Emelfm2
I found etc/mplayer/mplayer.conf
I hit the editing button and a page popped up with lots of entries with equal signs (the last one was zoom=true)
Under zoom=true I typed softvol=yes and under that softvol-max=500
I then saved and closed the page but on the main Emelfm2 page it said 'cannot create file etc/mplayer/mplayer.conf permission denied'

I am really new at this so any pointers or ideas would be really helpful. Thanks