
Install the plugin and press % to see the list of your environment variables, select one to automatically expand it on the search path or simply continue writing. Once you add the \ it would automatically expand. E.g, writing %appdata%\ would automatically become C:\Documents and Settings\Vitaly\Application Data\.
Notice: Only the variables that actually represent a folder, %PATH% and other variables won't be visible.
Download
http://vitalyb.dcmembers....RREnviormentVariables.zip
Enjoy!