[Inspiron 1525] Wireless Network Adapter missing

I had  to  Reinstall my windows Vista OS. My WNA was working prior to the OS reinstallation, so I  am  confused a bit. I have no idea how to reinstall drivers in  order that dell gives me. I have downloaded the drivers from the  Dell downloads section;however,  I don't know what to do next. I tried to go  to device manager and  find network adapter, but  it does not appear, only  an "other"  section with some ! marks next to them. Can someone explain how to do   the step by step  process or link me  to a support article? Thanks.