ok...
i just read this
"Lua library test
If the libraries have not already been tested on your camera and firmware version, you should run the script before attempting to use them. This script tests the various IO and OS functions, generating /llibtst.log and reporting pass or fail in the console. If not all tests are run, or there are failures, it may leave other files or directories in the root.
Image:Attention.png
Failures could crash your camera. It is also possible, although not likely, that it could corrupt your SD card. Use caution if your camera has not been tested.
The following cameras have been successfully tested as of October 07, 2009: "
and thought it meant not all cameras support it, i guess i gotta explore more...
thx!