Replacing a 2900Gi with a 2910VG - how?

Is there any easy way to copy over the config?<br/>
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We do not use the ISDN feature, and don't need any new 2910 features.<br/>
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I assume the 2910VG does everything the 2900Gi does, except ISDN.<br/>
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We use external ADSL modems (D-Link and Draytek).<br/>
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ALTERNATIVELY if anybody wants to get rid of their old 2900Gi, drop me an email peter (at) peter2000.co.uk <br/>
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I am planning to replace all this lot with Sonicwall TZ100W boxes, but it will take a lot of config to get it all working...