[Therion] KML model in Montenegro

I have been trying to create a model of an area on Montenegro. This area uses a local map system VGI which I thought was EPSG:3908 origin 18 degrees E scale 0.9999 false easting +6500000 false northing 0.0 Dx +653 Dy –212 Dz +431 Da +740 Df –0.00010441 When I use these in a gps (user grid etc) they produce the correct VGI coordinate to match the maps. I successfully produce a kml file but all the caves are about 400 east of where they should be. Is EPSG:3908 useable in Therion? A second little point, that I may have seen somewhere and now lost. How do you mark an entrance to show up as a point on a kml file I have used this for the lox output fix 1.0 6559346 4713067 766 # comment station 1.0 "GK103_SS" entrance John