Mail app 4.5 can't be used with 10.6.8 after security update?

Question

I just performed a security update based on an automatic notice to my Mac. It has made the mail app unaccesible  running OSX 10.6.8. Is there a solution or work around here? I don't think I'm the only one who has made this update and is running the Apple Mail.app.
Running
Hardware Overview:
  Model Name:    iMac
  Model Identifier:    iMac11,3
  Processor Name:    Intel Core i3
  Processor Speed:    3.2 GHz
  Number Of Processors:    1
  Total Number Of Cores:    2
  L2 Cache (per core):    256 KB
  L3 Cache:    4 MB
  Memory:    4 GB
  Processor Interconnect Speed:    5.86 GT/s
  Boot ROM Version:    IM112.0057.B00

Answer 1

Mac OS X v10.6: Mail.app won’t open, or "You can't use this version of Mail…" alert after installing Security Update 2012-004:
http://support.apple.com/kb/TS4424?viewlocale=en_US&locale=en_US
Fellow user Grant Bennet-Alder offers this solution:
Some users have reported this problem if the Mail Application has been moved out of the top-level /Applications folder, or duplicated in another location.
When the Security Update is done, the old version of Mail is disabled.
The solution has been to:
1) make certain Mail is in the /Applications folder
2) There is no other copy anywhere else.
3) Once steps 1 and 2 have been done, Manually download and re-apply the Security Update (2012-004) by hand.
Security Update 2012-004 (Snow Leopard)
If the Mail.app has been LOST, it can be re-installed by applying the 10.6.8 version 1.1 combo update. But this update is quite large and it is usually not necessary:
Mac OS X 10.6.8 Update Combo v1.1