Green and Blue Screens

Major props to anyone who can answer this question....... I was thinking of purchasing a chroma key/green screen backdrop because I have a lot of digital backdrops. What is the best way to swap out the background. To date I have used the magnetic lasso tool to cut subjects out and paste them on to another background, but the finished product looks like thats exactly what I did. I have seen other software that simply replaces the background. I have read everywhere that Adobe Photoshop is the "Industry Standard", therefore I refuse to purchase new software. What is the best method of making this work using Adobe Photoshop 7?

http://www.kenrickparish.com/jgeerling/articles/photography/photoshop-keying.html

That work? I would suggest searching Google for "Green Screen - Photoshop Tutorial"

you can also use mask mode and brush tool to that..