I built a Bart PE Disk with Litestep all I had to do was copy the contents of the Litestep folder to the root of the Bart CD
and made a theme the links to the apps in the bart file tree.
What you want to do is remove the netloadmodle entries from step.rc in litestep folder and use Loadmodule in your theme.
You also have set an Evar for the modules directory.
If you would like a copy of SilverFleep modified for Bart
let me know