To have any hope of helping, we need to know what card or chip set your wireless adapter has. From a command line, run the command 'lspci' and post the results. If this is a laptop; you didn't say; is this a pcmcia card?
Once we know what the hardware is, then we have a look for a linux KLM ( kernel loadable module ) ( a driver in windoze language ). If one exists, then I would suggest you use that.
If a KLM doesn't exist, then we can try installing Ndiswrapper, copy ALL the windoze files used for the card in windoze, then we load the windoze stuff with ndiswrapper.
That gets you to a point where you have a driver, now you have to 1. configure it to work with your router; 2. activate it.
It all starts by you finding out what the hardware is.