To get your Soundblaster working, have you tried uncommenting the Soundblaster line in /etc/rc.d/rc.modules?
That should get sound working for root. To get sound for other users, add the user's id to the 'sys' line in /etc/group (you can see what your user id is by typing id at the prompt). That sould do the trick, but if not try chmodding /dev/dsp, /dev/mixer and /dev/audio to 666.
Can't help with the mouse, sorry. You might get some pointers from this list of online resources (courtesy of Jack Lai's site)