failover, Load balancing, Cisco CEF

I have a cisco 1841 router. Bonded T1 and cable from two different providers. I would like to Load balance OR more importnatly Fail over if on link should fail.
Here is my problem. On my inside interface, i have a few secondary IP address assinged (for multiple gateways for mulpitle networks) [I.E. 10.0.2.1, 10.0.3.1 etc.]
All IP's are NATed for external tracfic. how would i fail over or balance the Nated Set up?
The cable will be attetched to the free Ethernet port. (FA0/1)

Attatched is the full config for this router.

SDMConfig.txt
DirerayneAsked:
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mr_dirtCommented:
NAT load balancing with IOS for two Internet connections is explained by a doc on cisco.com, here:

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080950834.shtml

I'm not sure if the configuration will address the secondary addresses on the router.  Are you running multiple IP subnets in one layer two domain?  This strikes me as bad design.
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DirerayneAuthor Commented:
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