How to configure a wireless router when mac address filtering is enabled by the ISP

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http://superuser.com – I am using i-on internet and they store the mac address of the PC and provide internet only for that PC. I want to configure a wireless router and I didn't get any help from them. Is it even possible to connect a wireless router for that network. If yes, How can I do that? PS: I am not sure whether it is correct section to post this question or not. But I didn't know a better place. Thanks Vinod (HowTos)