Cisco 501 to two ASA 5510?

[loade]

I was just wondering if this is at all possible...
Lets say I have a Cisco 501 and I wanted to setup a VPN to two ASA 5510 with differnt external IP address (two ISP's) that connect to the same network.

A diagram would look something like this, where 1.1.1.1, and 2.2.2.2 are the external interfaces:

1.1.1.1
____ [ASA]____
| |
[501]-| |----{LAN}
|____ [ASA]____|
2.2.2.2


They both don't need to be active at the same time, it's more of a redundancy situation.

Any help or a point in the right direction would be great!

Thanks