Vigor 2830n guest wireless

Just bought this and have set it up to run my LAN and to access the Internet including a 3G dongle working fine in failover mode. <br/>
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However guest wireless has me scatvhing my head, I have set up two ssid but just not sure of the settings to use to have a guest ssid separated from my LAN but with Internet access.<br/>
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Anyone have a blow by blow, idiot guide?<br/>
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Paul