Unable to load drivers for Wireless card or Nvidia card in 12.04

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http://askubuntu.com – I've looked through countless posts and tried several suggested lines of code for the terminal. I have a Dell Precision M50 I've installed Ubuntu 12.04 on. When I first installed, the display was pixelated and "broken" up looking. I played around with several post suggestions trying to get the Nvidia drivers loaded. My display looks better, but I only have 800x600 resolution now. I'm also trying to install a Linksys WPC54G V2 PCMCIA card because the internal wifi card isn't capable of anything but WEP. I'm not great with linux, and I've tried everything I can find or think of. If anybod (HowTos)