<snip>
...sound card ALS 4000 and modem motorola SM56 PCI...
</snip>

I'm not sure about the sound card; it is shown as supported by both OSS (the sound hooks used by Knoppix) and ALSA (the newer alternative). This info by way of a quick search on Google.

The modem is a different matter -- it's JUNK! Even Motorola has abandoned it (I scrapped mine a year ago). I would recommend an Intel "hardware-assisted" (HaM) modem. While not strictly a hardware modem, it IS supported by Linux and they are inexpensive; usually under US$20