High Availability with Apache on Windows Systems

Hi
I'm new in this group. I'm introducing myself with a topic a bit
complicated ... ;-)
I'm trying to realize a cluster of servers based on Windows 2003
server System.
I'm using Apache HTTP Server 2.2 as load balancing web server and I
whould like to perform the high availability to avoid that it whoud
become a "single point of failure".

Does anybody know if it is possible to perform high avaliability
(maybe usying "heartbeat" technic) with Apache on servers based on
Windows Systems?


I have found only articles speaking about that for servers based on
linux systems.


Thx to everyone.


jodeva77