We believe that your issue has been closed by the upload of
Version 0.9.14 of grml-autoconfig from Michael Prokop <mika@grml.org>.
The explanation is attached below

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Format: 1.8
Date: Sat, 16 Oct 2010 18:57:15 +0200
Source: grml-autoconfig
Binary: grml-autoconfig
Architecture: source all
Version: 0.9.14
Distribution: unstable
Urgency: low
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description: 
 grml-autoconfig - main bootup process of a Grml (based) system
Changes: 
 grml-autoconfig (0.9.14) unstable; urgency=low
 .
   [ Frank Terbeck ]
   * [67efa58] Fix config_debs() and make sure config_debnet() does not
     globally set options. [Closes: issue892]
 .
   [ Ulrich Dangel ]
   * [9c5f2cc] Fixed typo in manpage.
   * [86a6099] Swap position of pre-2009.05 and post-2009.05.
   * [6e63506] [e200e8e] [e200e8e] Provide variable NETSCRIPT for
     downloaded and executed script. [Closes: issue913]
   * [d019c32] Added test for the config_debs function to test the
     parameter count for the dpkg command.
 .
   [ Christian Hofstaedtler ]
   * [7920da3] Document run-parts restrictions for script= option.
     [Closes: issue906]
 .
   [ Michael Prokop ]
   * [5365fba] doc/grml-autoconfig.1.txt: no longer include
     grml-autoconfig.200905.txt. [Closes: issue891]
   * [3c76bd3] Bump Standards-Version to 3.9.1.
   * [95cf665] Add zsh to Build-Depends-Indep for tests.
   * [82bbb6e] tests/test_debs.sh: provide einfo/eend wrapper for
     non-existing grml-etc-core files /etc/grml/lsb-functions and
     /etc/grml_colors.
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Files: 
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It would be nice if the netscript bootoption exports an environment variable 
that could be used for checking whether the script is being executed under the 
netscript bootoption or manually. (I've deployment scripts that set up 
harddisks, the script should be executed if running under the netscript 
bootoption but shouldn't be executed by default if invoked manually. Checking 
for $SHLVL is possible but not reliable enough.)