Stereo Installation

I just bought an 01 LS and it only had a tape/cd changer controller radio, so I bought an indash Alpine CD changer on ebay that should go right in (I hope).
Could someone tell me if it is something easy to change, and what I would need to do to replace it.

Thanks...

Just unscrew the dash, and pull the old unit out. Or if you have some left over cash, best buy will install it for around $30