USB on DE2-70

hello,

I'm trying to send a video stream via USB to my PC. Could someone help me with a verilog example using the USB for this purpouse? I grab the video from two CMOS sensors (a board from TERASIC), and after a filter, I want to send the images to my pc ... I'm interested in the configurations i should use: CLIENT/HOST, bulk/Isochronous, etc...

PS: I'm not exactly a newbie, but I'm far from understanding what's the deal with the NIOS II...