HDL_Dump GUI is a graphical program, which helps to install PS2 games from a PC onto the PS2. Its based on the command line program hdl_dump and includes mostly all its functions in an easier way.
With it you can install PS2 games over LAN or on a locally connected PS2 HDD through IDE or USB. It also can list and edit the installed games from the HDD which is stored in your PS2. You also can copy the games back from the PS2 HDD onto your PC.
This app maybe a bit obsolete.
If you're having problem with launching this app, try Compatibility Mode: Windows XP SP3.