as far as I know, there is no way to do this with just litestep.
You can, however, use litestep+samurize (
samurize.com)+ the plugin labelled "FindTheTopProcess" (
http://www.samurize.com/modules/mydownloads/singlefile.php?com_mode=thread&com_order=0&lid=951&cid=6)
There is a screenshot here:
http://www.durhamstudents.co.uk/samurize/userfiles/6/FindTheTopProcess2.1.jpg (Note; you can also have plain text pinned to the desktop in any arrangement you would like: show one process and it's % of CPU; show all, and the %, show page faults, etc, etc, etc)
Try it out; it's exactly what you are looking for.
If you have any config questions, let me know; I'm willing to help :)