Cisco 1801 - ADSL/PPPoE - IPSec - Static NAT ---- 56K Dial Backup - NAT Overload

I am looking for a little guidance on coming up with a configuration for a very complicated situation. What I'm looking to do is to run a PPPoE ADSL connection on a Cisco 1801. This 1801 will then need to do an IPSec tunnel back to a Juniper ERX.

Also, I will need to do several Static NATs with one of the subnets that will be tunneled. For example, the ethernet subnet of the Cisco will be I will then route via the IPSec tunnel and will need to create specific Static NAT's throughout the subnet, such as will equal

The real problem I am trying to wrap my head around is doing the Dial Backup and then doing a NAT Overload on the Dialer interface in conjunction to the vpdn pppoe dialer and the IPSec tunnel with Static NAT configs.

Any thoughts or suggestions?

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