It's now possible to add multiple kml-files to the map. Google renderer has a limit of maximum 25 kml layers on one map.

With the Google renderer, you'll need to set the center of the map yourself.

{mosmap kml[0]='http://tech.reumer.net /images/florida.kml'|
kml[1]='http://tech.reumer.net /images/allservices.kml'|
centerlat='0'| centerlon='0'| zoom='1'| kml[2]='http://tech.reumer.net /images/Countries.kml'}

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With the GeoXML renderer, you don't need to set center. It will zoom automatically. Also you can sort the items inside a kml file in the sidebar (asc or desc)

{mosmap kml[0]='http://tech.reumer.net /images/florida.kml'|
kml[1]= 'images/allservices.kml'|
centerlat='0'| centerlon='0'| zoom='1'|
kml[2]= '/images/Countries.kml'|
kmlrenderer='geoxml'| kmlsidebar='left'| kmlsbwidth='200'| kmlsbsort='desc'}

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If you configured at the configuration to use [] or both {} and [] around mosmap then you need to use () for multiple kml. So:

[mosmap kml(0)='http://tech.reumer.net /images/florida.kml'|
kml(1)='http://tech.reumer.net /images/allservices.kml'|
centerlat='0'| centerlon='0'| zoom='1'|
kml(2)='http://tech.reumer.net /images/Countries.kml'|
kmlrenderer='geoxml'| kmlsidebar='left'| kmlsbwidth='200'| kmlsbsort='desc']