Loose buttons

My PSP buttons have become loose and I want to make it normal again.
I read in somewhere that all I need to do is take out the faceplate and rearrange the buttons to their original positions.
But I'm afraid to do it unless I have pictures and instructions to guide me.Can someone help me?

Edit: Btw, I'm looking for a transparent faceplate. Is there any sites selling it?

Try here it is a tutorial to change lcd but first few steps cover what you need. http://www.llamma.com/PSP/PSPTearDown.htm