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Posting
Given the little inforamation you've provided about your setup and/or exactly what kind of load balancing you're trying to achieve, the following might be all you need (might not too).
ip route 0.0.0.0 0.0.0.0 x.x.x.x name ISP1
ip route 0.0.0.0 0.0.0.0 y.y.y.y name ISP2
