So, I assume that its a card inside your computer, yes?
If it uses ppp there is a chance to get it working, a pretty good chance id say.. But then its done via ppp0 and not eth0.. Nevertheless, should be availabme in the knoppix menu..
A kernel is the core of an operating system. In windows you can find it as kernel32.dll (that likes to crash often.. (
and in linux systems it is the kernel written originally by Linus Torvalds.. The kernel is a quite complicated thing as its the thing that basicly make the OS work with the hardware yove got.. The linux kernel is extrememly versatile and modular, so there arnt (not many atleast) kernels that "support all a kernel can" so in some cases you might have to compile needed support into it yourself. But that is a totally nother matter.. If you got interested, have a look at http://www.kernel.org