the capture card should come with the software for using it. the way it works is it is normally a PCI card that has the audio and video input...most cards double as a tv tuner also....so u can watch TV on the computer. make sure when you purchase the tuner to look at the max resolution that it will record at...because mine only records at 640x480 res....so the movies arent all that good quality...just do a newegg search on em...and read a lil...there not complicated at all