How to install video card

"I have very little experience with internal computer or settings. I have a dell dimension B110 with celeron D windows xp home with just a standard dell 15inch monitor. The objective here is to connect my sony 37inch lcd xbr tv screen to this computer. I have already run hdmi cable from tv to back of computer cabinet. I have a philips hdmi to dvi adapter and I have a sapphiretech ati radeon x1650 pro video card that needs to be installed. (computer has its standard video card installed at this time) this video card came from an extra computer at my office, so there is no instructions for installation of the card, nor any disk with it for installation. can you assist me in how to go about removal of standard video card, replacing with X1650 pro card and fine tuning setting for optimal use of this computer with BOTH dell standard monitor and Sony XBR lcd tv. Desire is only to be able to use the tv for the monitor when using wireless keyboard at kitchen counter and still leaving intact regular monitor at computer for use when there. Thanks !!!!"