Help on Saturday the 28th

I am using Ubuntu on my computer and would like to make the tower wireless.
Things are not well located in my home to use this tower on a cat 5 cable.
To date I have been unable to install an Antenna (linksys) or PCI card
D-Link and make them work. I am willing to purchase other Cards or Antenna if they
can be made to work.
I will be bringing this tower to the Install fest on the 28th of May.

Joe Zagar