Firstly, unpack the distribution tar file that you have received:
tar vzxf dual.tar.gz
After unpacking the tar file, become root as you will need to be root
to install into the kernel source directory. Type: make -n
to see how the Makefile will install the source code. Note that it places the
applications in /usr/local/src/dual_apps, and expects the kernel
source code to reside in sys.
Change the Makefile if you want the DUAL applications source to go elsewhere, of if your kernel source code is not kept in /sys. If it all looks ok, cross your fingers and type: make. Hopefully only the patches file will fail, and if so, you will have to hand-patch your kernel code to install DUAL.