Found a way to install the patches without "install" the game.
Create a registration entry file like:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\SOFTWARE\WillPlus\Guilty\虜ノ契~家族のために身体を差し出す姉と妹~Re:]
"INSTALLDIR"="D:\\[temp]\\HG\\[Guilty] 虜ノ契 -家族のために身体を差し出す姉と妹- Re:\\"...