I am a newbie and need some help getting my sierra wireless aircard 595u working with knoppix 6. I've received some information from Sierra's website and have downloaded an updated driver and ppp script. However, they said that prior to installing the driver I need to make sure that the kernel source code is located in /usr/src/linux. How do I determine the location of the source code and if I need to change the location how do I go about doing this without messing things up?