I also have a Samsung ML-1665 und use is on LinuxMind and ist working very very bad. Sometimes have to press print 6 times till it works. Also the Install routine is very ugly software.
The ML-1665 is connected via usb but the installer did not see him:
Bus 005 Device 003: ID 04e8:3301 Samsung Electronics Co., Ltd
Sane is installed but the installer did not see it.
Also Samsung offer the driver for this printer, but the given driver only support 1660:
Samsung is like Lexmark, working very bad on linux.