hi

the dpkg -l doesnt see the packages as installed. So I did what you told me, here is the output :
root@Nokia-N900:~# apt-get install "mp-fremantle-*"
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting mp-fremantle-002-pr for regex 'mp-fremantle-*'
Note, selecting mp-fremantle-203-pr for regex 'mp-fremantle-*'
Note, selecting mp-fremantle-003-pr for regex 'mp-fremantle-*'
Note, selecting mp-fremantle-generic-pr for regex 'mp-fremantle-*'
Note, selecting mp-fremantle-004-pr for regex 'mp-fremantle-*'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
mp-fremantle-generic-pr: Depends: libsdl-mixer1.2 (= 1:1.2.6-5+0m5)
E: Broken packages

root@Nokia-N900:~# dpkg -l |grep libsdl-mixer
ii libsdl-mixer1.2 1:1.2.6-5+0m5+ogg+mp3 Mixer library for libSDL