The plugin is designed for laying road route between the cities of Russia and major European cities. Russian language only.
Extract the zip file and just drop the contents in the wp-content/plugins/ directory of your WordPress installation and then activate the Plugin from Plugins page.
There are two work modes:
Simple mode (this is default): calculation results are shown on Avtodispetcher.Ru after form submit. Field's autocomplete does not work.
Advanced mode: calculation results are displayed on your site. Field's autocomplete does work. Stylized link "powered by" is displayed in widget sidebar.
You can switch this modes on Settings > Distance Calculator Settings page.