First Try Success! Sort of...
First of all, I would like to thank the original poster of this thread because I never would have attempted this procedure without an excellent guide like this. Next, those users who posted helpful, encouraging replies (not you pessimistic idiots that spoke out against the idea of replacing the back cover all together).
I purchased a new (original 8GB) silver iPhone back casing and antenna cover from ebay for about 40 bucks (including shipping). Fortunately, this deal also provided me with size "000" flat and phillips head screw drivers along with two different iPod opening tools (a total of 3 separate opening devices since one was double sided!). I followed these instructions precisely, including using the original adhesive remover solvent method, also bearing in mind the noted issues with the vibrate, brittle skeleton, removing buttons first, etc. I took my time, amounting to a total of about 3 and a half hours, and now have a beautiful, new looking, original functioning 8GB iPhone with working vibrate, ring, and all sound functions. There are, however, a few suggestions I have that I feel MUST be noted for anyone who might attempt this procedure:
1. First of all, USE THE ADHESIVE REMOVER/SOLVENT METHOD! Beyond the easy, necessary procedure of removing the original antenna cover and back casing, I feel that a good adhesive remover will make the "un-gluing" process of the iPhone skeleton the easiest step! I simply removed the headphone jack, switches, vibrator, etc., RIPPED APART THE INSIDE LEFT SIDE OF MY ORIGINAL CASING IN ORDER TO REMOVE THE RING/VIBRATE AND VOLUME BUTTONS, and just let it soak in the strongest adhesive remover I could find at Sears Hardware (different brand than in the guide) for about a half hour, and when I pulled it out, literally 3 of the pieces just fell off!
2. You will notice that the skeleton pieces around the perimeter of the casing are the most difficult to dislodge from Apple's "evil" adhesive. Just be very careful when using the mini flat head screw driver to pry them off, because as originally noted, THEY ARE INCREDIBLY BRITTLE AND DON'T BEND! The very thin, shiny metal pieces are actually quite simple to remove with a sharp razor blade after allowing the original casing to soak in the adhesive remover.
3. I absolutely have to note this because I literally had my heart broken twice during this procedure... WHEN GLUING THE INSIDE LEFT FRAME PIECE TO THE CASING, REMEMBER TO PUT IN BOTH THE VOLUME AND RING/VIBRATE SWITCHES FIRST! Believe it or not, I glued it on the first time with only the ring/vibrate switch in, and had to use the adhesive remover again to remove the entire piece. Unfortunately, when removing it, I broke off one of the inside tabs, and when I was trying to clean the glue off of the skeleton piece, the corner portion of the piece broke off. Then, I GLUED THEM ON AGAIN WITHOUT PUTTING IN EITHER BUTTON FIRST! I truly cease to amaze myself sometimes.. Fortunately, the missing tab proved insignificant, and I was able to attach the corner piece separately, with no issues whatsoever, on my third attempt (I finally remembered to put in the ring/vibrate switch and volume button!).
4. The ABSOLUTE MOST DIFFICULT step for me was getting the mini screws back in. Even with a magnetic "000" phillips head screw driver, this was painstakingly tedious. I honestly have no good advice for this step besides have patience, and don't dip (chew tobacco) while attempting (even the most advanced nicotine abusers will have some shake to their hands whilst and after using). Don't push too hard when you first get the screws in the holes- just gently tighten because sometimes the magnetic power of the screw driver will work against you.
5. BE CAREFUL TO NOT GET WHATEVER ADHESIVE YOU ARE USING ON YOUR NEW BACK CASING DURING THE PROCEDURE! After I finished, I realized there were a few "super glue" spots on my new casing and it took me over and hour with a razor blade and calm nerves to get (most of) it off.
This truly is not that difficult a process! Granted I am a computer science major, I have had very little experience with "dissecting" electronics, but just an interest and determination, and I succeeded just fine. Simply take your time and let the perfectionist within shine through. I couldn't stand seeing my iphone dented and scratched and feel this was well worth the effort. Unfortunately (since my iPhone is my camera) I could not photographically document my experience, but the photos provided in the initial post helped immensely. Also, this YouTube video (not sure if recommended earlier in the thread)
http://youtube.com/watch?v=qbvV2SITpPU made the process a lot easier.
Thanks again, and good luck to any and all of you other brave souls out there!
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√ iMac 20" 2.4GHz
√ MacBook White 2.0GHz
√ iPhone 8GB