There is no SETUP.EXE program to install this driver. It must be installed using the add new hardware method.
Unzip to a temp folder. When prompted for driver just point to the folder where you unzipped this file to.
The following files are found inside the driver download file.
|L1730SF/L1730SF.icm||624 bytes||14 Apr 2005|
|L1730SF/L1730SF.inf||1.3 KB||4 May 2005|
|L1730SF/l1730sf.cat||24.3 KB||9 May 2005|