WAN failover + IPSec to Cisco ASA

[monkness]

hello,

i have a problem:

I have 2 WAN ISP in my branch office(MSR 900 is used), and 2 WAN ISP in a central office (ASA 5510 is used).

As I understand i can't use DVPN(ASA do not support it), but i need to automaticly switch IPSec if one ISP (in branch or central office) is down.

On ASA side it is possible to build connection to 2 peer:

crypto map test 1 set peer x.x.x.x y.y.y.y (for example).

Is it possible to use something like that on HP MSR, or i have to use 4 different IPSec (1ISP to 1ISP, 1ISP to 2ISP, 2ISP to 1ISP and 2ISP to 2ISP)?

Or may be there is another way to solve this problem? 

P.S. sorry in HP technology i understand not much, ussualy work with Cisco.

P.P.S. sorry for my inglish:)