A great how-to on converting a VGA to RJ45. From the site, “I was just about to finish my projector project when I hit a snag. I needed a super long VGA cable to reach from the LCD my computer, which were on opposite sides of the room. Initially I was going to move my computer to the projector but decided against it. I read a few articles involved with VGA conversion and decided to give it a shot. Of course it might have been more practical to buy an extra long VGA cord for around $25 plus shipping, albeit more expensive.” Thanks jher! Link.
HOW TO – VGA to RJ45 Conversion