What does the program Samsung Kies light do? I use Samsung kies for my Galaxy S1 and I also installed Kies Light but I don't understand what it does. I would like the function the send SMS from my computer, can it do that or what does it do?
Source: Samsung FAQs: Cell Phones: What is Kies Lite mode, and what can I do when using it?

Kies Lite mode launches the application with a reduced set of features. This uses fewer system resources and lets some key features of Kies run more efficiently. Using Kies Lite mode, you can access and use these features more quickly: Firmware Upgrade, Sync Data, Backup, and Restore.
You can switch to Kies Lite mode by clicking Kies Lite Mode Icon in the top-right corner of the screen. If you switch to Kies Lite and you close the application, Kies will open in Lite mode next time you run the application. To switch back to &quot;normal&quot; Kies mode, simply click the icon again.
Or open Kies in Lite mode by double-clicking Kies Lite Icon on your Windows® desktop.

So it would seem that the functionality is limited to: Firmware Upgrade, Sync Data, Backup, and Restore.