HA setup using xymonproxy

Hi,

I'm trying to configure a pair of xymon servers each in a different
datacentre, following the approach 2 given in
http://en.wikibooks.org/wiki/System_Monitoring_with_Xymon/Administration_Guide#HA-WAN_2_approach

Is this still a favoured approach and if so, how do you avoid a loop with
client reports being endlessly forwarded between Xymon servers?  Can anyone
point me in the correct direction or show me what the configuration for
xymond and xymonproxy would look like?
Thanks
-- 
Andy