To monitor device/s first select the device/s on the OV map
and then execute the mrtg add menu option under Misc

This firstly creates the collection file for xnmCollect
via perl ovcols ip/s.

xnmcollect is then called to -merge the new collection file
xnmcollect is then called -event to activate the collection process

Next, it creates the config file via perl cfgmakerov for each
which also creates any needed new directory under
$webdir/XXXrtrZ
where XXXrtrZ is the device name.

Then it creates the html generation files

The file ovmrtgc.csv is updated with the IP address of the device, the
SNMP sysName and the IP Hostname.

If all this has worked OK, it then creates the 5 minute execution file $cronfile

Finally, 
$webdir/$roothtml is created to display the devices.