This patch implements customizable background music for crack-attack 1.1.8 using SDL_mixer. For enjoy this hack download the original code from here (sorry, this is available only for Linux yet) and apply my patch with -p1


$ wget http://aluminumangel.org/cgi-bin/download_counter.cgi?attack_linux+attack/crack-attack-1.1.8.tar.gz
$ tar xvfz crack-attack-1.1.8.tar.gz
$ cd crack-attack-1.1.8.tar.gz
$ patch -p1 -i /path/to/my/patch
$ ./configure && make
$ su
# make install

OK, now install some music files at /usr/local/share/crack-attack/music/ or $(HOME)/.crack-attack/music/ and you can enjoy background music :-)