Really? Assuming nothing changed, the name of the tpatch file should match the prefix of the sav files that appear when you launch the game (the "saicosh" part). Otherwise the thing gets confused and doesn't read the patch.
edit: fixed it for 1 of the steam versions fully, the other one is half fixed (menu is in japanese, dialogue is in english, and it doesnt say what character is speaking in the text box)
