mind you, that it might eventually start freezing up and acting weird (mine and a couple of my friends did)...it's not going to die you just have to clear the cache on your hard drive. I'm pointing that out because mine started having the symptoms my original 360 had when it got the RRoD and I started freaking but it was nothing
well as long as it's the over heating issue which 99% of the time it is. you just need the correct size bols and washers, remove the heatsinks clean them, drill the metal case thead the bolts through the case and motherboard, put new heatsink goo stuff on (mind has gone blank on the name), bolt the heatsinks down, test it, if it work its done if it doesn't turn it on with out the fan till it shouts at you with blinky lights, turn it off, tighten the bolts let it cool and it shold work. thats basicaly it
no problem...it's impossible to do without looking at a guide. just google "Clear Cache on 360" there's a button combo you need to type in and everything
1: Xbox 360 Premium 20GB HDD with HDMI Port 2: New TV Actually used the HDMI port 3: Upgraded to 120GB HDD sold my old 20GB one