You might try modifying this script for your purposes. This an Embedded Event Manager script. See attachment.

Perhaps you could use the NAT support for Route Maps with Static Translation feature. Take a look at:http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1839/products_feature_guide09186a0080087bac.html

This is fixed with CSCdr92559 or by upgrading the 12.0 router. The HSRP packet format changed between 12.0 and 12.2 resulting in the warning message due to different packet format. This has no detrimental effect on the operation of HSRP.Hope this hel...

I suggest you contact your Cisco account rep and request some information and design assistance. Without really getting into detail on what you need to do and exchanging diagrams etc. it's hard to know if this solution is right for you. Regards,Rick...