With unequal cost load sharing the router would load balance traffic across multiple paths proportionate to the metric. Let's say if the router has two paths to get to destination X, one with metric 10 and another one with metric of 30. When configured to do unequal-cost load sharing the router install both paths in the routing table and load share packets on a 3:1 basis out those links based on the metric of 30/10.
I don't know if you were looking for the configuration needed to do unequal cost load sharing and if you do here's a small example to illustrate this.
router eigrp 1
variance 3
With a variance of 3 the router would install a route that has a metric inferior by up to 3 times than that of the best metric. A route that has the best metric of 10 and another path with a metric of 30 would cause the router to use both paths.
HTH
Sundar
