1) alsa-modules-2.4-k7
2) alsa-modules-2.4.27-2-k7
That 2.4-k7 or 2.4.27 indicates it is for a 2.4.x kernel series. You indicate that you are running 2.6.12 a 2.6.x kernel. You simply can not install & use a 2.4.x alsa with a 2.6.x kernel. It will not work. It would be like trying to use a sound driver designed for window 98 and getting it to work on windows 2003 server. It will not work.

You are asking for much headache or stress by installing a Knoppix (a Debian derived variant) as a HD based Debian-like machine. Then you are asking for further stress by trying to upgrade it to a 64 bit machine by upgrading the kernel & its libs. You should just install Debian amd64 CDs via http http://cdimage.debian.org/cdimage/un...-amd64/iso-cd/ or bittorrent http://cdimage.debian.org/cdimage/un...e-amd64/bt-cd/