all u have to do is go to control panel>system>hardware>device manager>display and disable the intel graphics.
then u shut down the computer and insert your card. and plug in the monitor to the appropriate port
after u turn on the computer, the computer should recognize the card and automatically install the proper drivers. then after startup, go to control panel>display to change the resolution to what u want. then go on the internet and download the latest catalyst drivers.
btw...i dont think your card supports the multimedia features such as remote wonder.
personally, i would not have bought the ati card and went with a fx5200 or 5500. but the 9250 is capable of playing bf2 at low settings. try looking for an ati overclocking tool to raise the performance and it should be ok. i can play bf2 on the lowest setttings on my computer setup with a nvidia 5200 so should be just fine.