For all the people that have an AR2425 based Atheros card (e.g. AR5007EG), it has been a lot of time without knowing with which driver it should work correctly.
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For those, who have an Atheros 5007EG chipset and can't get it working with ndiswrapper, I have this guide from polish ubuntuforum. This is the only solution that worked on my computer (Toshiba SAT-A210-128), and my brothers computer.
This guide only works on i386 platforms, so if you're running an x64 linux, then you've to try again with ndiswrapper or wait for a new solution from atheros and madwifi.