iphone screen repair
I used this video to replace an iPhone 4 screen last week:
Part1 explains how to take the phone apart http://www.youtube.com/watch?v=sOT7PULAU1c
and part2 shows how to put it all back again http://www.youtube.com/watch?v=H8IyPbEGg_M
It took me 1h30 to do... but I was...
The 3G and 3GS replacement screens look exactly the same, except for a small difference in the connector.
The 3GS has a tiny back spacer in the middle of the connector wires while the 3G does not.
Here is a pic: