To my knowledge the only way to get the truemobile card to work is with the driverloader module from www.linuxant.com, or maybe ndiswrapper. But as far as getting these to work with Knoppix. I don't think so.

I have driverloader working fine with a debian install on the Inspiron 5150, but it isn't free. You get a 30 day trial but then you have to buy it.

good luck

Slaithen