Install game
Install Apploc
Unrar Context menu.rar then run install.reg > Ok
Install patch
Right click on Custom maid 3D desktop icon and select Japanese locale
Done!
Install order:
(You should run the game first before install and remember to backup game too)
Main game > Visual Pack ([DLC]) > Skill Pack (SP)>Natsu Pack (Summer Pack, SP)>Personality Pack (PP)>Gold Disk 3>FP (Fuyu Pack)>SP2 (Skill Pack 2)