Nichestack and UDP

Hi, I am currently trying to configure altera's web server reference design on a cyclone IV FPGA. I want the webserver to transmit with the UDP/IP protocoll, and not TCP/IP. I can see that the nichestack always has udp enabled, but how and where can I do this?

I am not asking for the full solution here, but all hints and help is appreciated! Thanks in advance.