You can make your own ymap pack if you edit the custom_maps folder with OpenIV, click on edit and then right click a blank area 
where the files are displayed, and choose "Import OpenFormat". Select the ymap file and you will see a blue screen appear to 
import the xml ymap files. Close OpenIV and you have now compiled your own ymap folder. Don't place more than 6 maps of mine in 
the custom maps folder otherwise there will be texture problems with some world objects, also some maps will miss then some objects. 
