Are there any instructions on how to replace a cracked screen on an Iphone 4?

I have the replacement kit for a cracked screen for the Iphone 4 but it came with no instructions.

I would say go to YouTube but you wouldn't get a straight answer. Or if you did you'd get a partial video. If they've given you the right tools then you pry the sides off by "jamming" the flat heads in all sides. Then gently pry off the screen and remove the ribbon cable from the screen. The tricky part is getting the new ribbon cable on. The company uses special tools to get them back on. When I say ribbon cable I mean the only cable that is attaching the screen to the device. Personally if you've never done it before I'd take it to dr.phonez or some other joint to get it fixed. It's like $80 so in the long run its better to get it done by a proffesional than to risk breaking it by doing it yourself