I don't really know how the license included with the kit works, but AFAIK it is valid for one year and you can use it to install the latest subscription edition of Quartus. If it doesn't work you should contact your local Altera representative to try and find a solution.
Now for the Ethernet, there isn't any attached file with your message...
To make the Ethernet work you need an FPGA configuration that includes a triple speed Ethernet MAC. I don't know if it is included in the DSP kit CD, but it is most probably with the installation for the stratix iii development kit (
http://www.altera.com/products/devkits/altera/kit-siii-host.html).