How to incorporate sudo into Xymon?

Hi,

I've looked around for a way to use sudo fetching logfiles/message-logs etc. with Xymon without changing groups and rights on various files/dirs, but the wiki-document which describes it (http://en.wikibooks.org/wiki/System_Monitoring_with_Xymon/Other_Docs/HOWTO) seems to be outdated - so my question is how to do it with Xymon 4.3.0+?

/melgaard