the sourcecode of screensaver is found here:
your_AM_folder\screensaver\screensaver.nut
there exists various variables:
in_time, out_time, duration, elapsed, start_time, ttime, and so on.
Probably if one of these variables is set to 10000 (10 seconds) or via a simple math calculation gives the result of 10 for endtime, it will work.
But I can't program squirrel language and can't help.