Im trying to install ndiswrapper, but when I cd to the directory and type make it returns this

make -C driver
make [1]: entering directory '/home/nathan/ndiswrapper-0.10/driver'
You dont seem to have sources for your kernel; install them in /usr/src, link /libs/modules/2.6.3-7mdk/build to it and try again.
make[1]: *** [prereq_check] error 1
make[1]: leaving directory '/home/nathan/ndiswrapper-0.10/driver'
make: *** [all] error 2

Kernel.org doesnt have a source for 2.6.3-7 only 2.6.3 which I have downloaded and put in /usr/src/, but what do I name it?

uname -a returns 2.6.3-7mdk as my kernel.

Ive also tried changing the kernel to 2.6.8.1 but I didnt seem to be able to get it to work(new to linux).

Thanks.