[plt-scheme] Scribble: Table of content question

Is there a possibility to reduce the depth of the table of content produced
by the table-of-content or local-table-of-content command?
I have scribble files, which are included by include-section commands into
the upper level files and would like to hide their contents in the upper
level table of contents. This is mainly because otherwise the top level
table of contents becomes very long and unpractical. 
Thanks
Robert

_________________________________________
Robert Matovinovic
Wintererstr. 61
79104 Freiburg
Germany
 
Tel:    +49 (0)761 51 93 544
Cell:   +49 (0)171 56 32 330
email: robert.matovinovic at web.de