On http://en.touhouwiki.net/wiki/Game_Tools_and_Modifications#General_Utilities written that Touhou Toolkit and Brightmoon can work with 1(2)-5 parts. But these programs can extract only the .dat-files and three types of files that are obtained after extraction dat-files, and parts 1-5 are stored in the hdi-files. How to unpack hdi-files?