I have installed osso-xterm already.

When im starting oggplay from the menu it just says "loading oggplay" for about 5 seconds then nothing happens.

When i start it from the terminal i get this message:
Nokia-N800-51:/# oggplay
oggplay: error while loading shared libraries: libXau.so.0: cannot open shared object file: No such file or directory

Hmm... open an xerm, then go to /usr/lib

What does ls -l libXau* give you?
Mine looks like this:
lrwxrwxrwx 1 root root 15 Mar 15 07:29 libXau.so.0 -> libXau.so.0.0.0
-rw-r--r-- 1 root root 7132 May 26 2006 libXau.so.0.0.0
lrwxrwxrwx 1 root root 15 Dec 20 05:23 libXau.so.6 -> libXau.so.6.0.0
-rw-r--r-- 1 root root 8536 Aug 2 2006 libXau.so.6.0.0
/usr/lib $ file libXau.so.0

R.
==

This is what i got:

Nokia-N800-51:/usr/lib# ls -l libXau*
lrwxrwxrwx 1 root root 15 Dec 20 12:23 libXau.so.6 -> libXau.so.6.0.0
-rw-r--r-- 1 root root 8536 Aug 2 2006 libXau.so.6.0.0

Enable red pill mode in the application manager, then you will be able to install the libXau package.

Thanks, i finally got oggplay to work but its not a good music player.

I didnt even find a way to add a directory.

Seems like there is another solution :
http://kilikali.garage.maemo.org/