How do I make an image all dark/white(/grey) with Photoshop CS3 ?

http://lmgtfy.com/?q=make+image+greyscale+photoshop

1. Hit control+U
2. Make saturation -100
3. ...
4. PROFIT!

Thanks! =)
Sorry, I didn't know it was called "greyscale" so I just couldn't search for it properly. XD

Theres also: Image -> Adjustments -> Black and White (If I recall, I don't have photoshop in front of me right now)

It allows you to make an image black and white and fine-tune the settings.

Yea, you should take note that their are different way to do it payne. Some truly make the image black and white, as if the picture was taken from a camera that couldn't possibly take color pictures and some ways just take the color out of it or something like that. Point is that it's a different process depending on how you do it if your trying to get specific results. If I didn't suck at Photoshop I could explain that to you better. Alas, i suck.