Linksys wpc54g v3 adpt. wont work with ubuntu and ideas

i have ubuntu on my laptop i also have a linksys wpc54g v 3 wireless adpt. it won't work can someone give me a step by step why to make this work i really don't want to go back to ms thanks

The best use is the exact Linksys description at their website.
The installation and use Step by Step would be too long for this tech support site.