S&T is not a stand alone program. It needs entries in Windows registry. That said, the SD card will appear as another drive letter so you could use the custom install option to put S&T there.
You would still need some method of installing S&T though. A networked or USB DVD reader would do the job. Or you could copy it to an SD or USB storage device, transfer it to your netbook in its own folder, install it to the SD card and erase the storage folder. Or you could download it to the netbook, install to your SD card and delete the downloaded folder.
The free 60 day trial is in this thread:
http://www.laptopgpsworld.com/micros...ps-2009-a.html
The netbook may not be able to read from the SD card as quickly as the built-in SSD though so this may affect S&T performance.
Terry