Thanks rusty, but...

When, folowing your advice, try to install aptitude, I get this:

Code:
Setting up apt (0.7.9) ...
/usr/bin/apt-key: line 16:  4769 Segmentation fault      $GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export
      4770                       | $GPG --ignore-time-conflict --import
dpkg: error processing apt (--configure):
 subprocess post-installation script returned error exit status 139
Errors were encountered while processing:
 apt
E: Sub-process /usr/bin/dpkg returned an error code (1)
Is the first time a saw an error like this ....

what about this?
http://code.google.com/p/hakix/

Regards-