Putting in a background
 

I've got somewhat of a silly dilemma here...half a year ago I could remove the background from an image and put another one in quite quickly. Now I have a picture that some friends want a new background put in, but I've forgotten how! I'm working on re-educating myself, and thought that maybe someone here would know what to do. I'm using photoshop elements 3.0
Attached is the picture I'm working with.

Open you original image then go Select>All >Edit> Copy and then open your background image and go Edit>Paste > this will paste your subject on top of your new background.You can now close down the original image which will leave the new layered image to work on, click on layer 1 in the layers pallete to activate it and use the selection tool of your choice (eraser lasso tools etc) to remove the background from layer 1 and leave your new background showing.

A Quick and Dirty Example, I used the magic extractor in Elements5

Many thanks!

I use a similar method to Craftysnapper, but blur the edges of the trimmed images - gives a softer and more realistic look.