Umm ... no.
You create a shell-script with vi,
and call it let's say my_noise.sh
In this you put
`which xmms` ~/noise.m3u
You save that, and let's say
put it into /usr/bin
mv my_noise.sh /usr/bin/.
Then you chmod it (from any
terminal) so it's executable for
chmod ugo+x /usr/bin/my_noise.sh
Now let's assume that your normal
user has a xmms playlist that's called
noise.m3u and that lives in his home,
clicking on the /usr/bin/my_noise.sh
will bring up xmms, automagically playing
the users list.