I love this game. Both the PS2 and PSP version have a special place in my heart. The PS2 disc that I have is sadly unusable now due to disc rot, but I am still playing the PSP version to this day. Of course, I emulated the game, but I do believe that a native port to PC would be a great addition to Good Old Games' catalogue.
Of course, they will probably have to either get Koei Tecmo's permission to reverse engineer the code and recompile them for PC or somehow convince Koei to remake this game themselves (which is unlikely), but hey, a man can hope, you know.