I need to get Audigy2 working, but I have no Idea how.
How I do that?
In Mandrake I could do that just by couple mouse clicks, but in debian it isn't so simple?

check to have all ALSA packages and compile your kernel with the snd-emu10k1 module

First apt-get install alsa alsa-utils
then alsaconfig as root (if you are using sarge/sid the module should already be loaded thanks to the autodetection system, you can verify this by typing lsmod: you should see something with emu10k1) --> select emu10k1.

Now you need to run alsamixer to unmute your sound channel. Scroll to the right until you find: Audigy Analog/Digital Output Jack, and press m to unmute it. Now scroll back to the master channel and set that to 50% or so. When you apt-getted alsa, it should have automatically added it to starting services so you won't have to worry about that.

That's it, everything should be working now