Yup, you can get the cables from most electronics stores, like radio shack and circuit city. As Tyler said there are 6 to 6, 4 to 6, and 4 to 4. My desktop is a 6 pin and my laptop is a 4...Yay.
I decided to do this properly this time. Sun sets at approx 6:30 pm, so I set the camera on a tripod and took 3 fotos every 5 min from 6-6:30 pm. I combined 6 exposures I liked best in an HDR. The sun sets very red all the time in the altiplano and, as usual, there were no clouds in the sky.