For creating more advanced models in D+ see the Usage Examples and Lua scripts (using Lua programming language). 

Some .state files include paths to .lua and .pdb files.

Note that the paths are absolute - not relative, therefore when transferring them please ensure you change the paths as well (using Notepad++ for example).
If not, when loaded into D+, the software will alert you that the files have not been found.

For better visualization of .state files in Notepad++, install the plugin "JSTool". After the plugin is installed, pressing "Ctrl" + "Alt" + "M" will rearrange the .state file in a tree. D+ is able to load .state files after rearrangement by "JSTool" plugin.