Would it be easy to replace a knock sensor myself?

Im afraid its not going to be easy to replace. Its under the intake and everything hooked to it. I found this on google for a location. http://www.google.com/imgres?imgurl=http://ww2.justanswer.com/uploads/baddad1/2010-12-29_141552_capture.png&imgrefurl=http://www.justanswer.com/nissan/4e6il-nissan-datsun-xterra-nissan-xterra-2001-knock-sensor-code.html&usg=__AysyAZhwEBAmPz9kFrUT6p3GpwQ=&h=570&w=1105&sz=80&hl=en&start=18&zoom=1&tbnid=fhfaGfutXswAbM:&tbnh=119&tbnw=231&ei=MXYcTpmMGu39sQKO0pXhCA&prev=/search%3Fq%3D2001%2Bnissan%2Bxterra%2Bknock%2Bsensor%26hl%3Den%26sa%3DX%26biw%3D1280%26bih%3D685%26tbm%3Disch&itbs=1&iact=hc&vpx=360&vpy=286&dur=604&hovh=161&hovw=313&tx=123&ty=93&page=2&ndsp=16&ved=1t:429,r:7,s:18&biw=1280&bih=685