--- a/CookBook/document/root.tex	Fri Mar 13 16:57:16 2009 +0100
+++ b/CookBook/document/root.tex	Sat Mar 14 00:48:22 2009 +0100
@@ -97,6 +97,10 @@
 \renewcommand{\isataglinenosgray}{\begin{vanishML}\begin{graybox}\begin{linenos}}
 \renewcommand{\endisataglinenosgray}{\end{linenos}\end{graybox}\end{vanishML}}
 
+\isakeeptag{gray}
+\renewcommand{\isataggray}{\begin{graybox}}
+\renewcommand{\endisataggray}{\end{graybox}}
+
 \isakeeptag{small}
 \renewcommand{\isatagsmall}{\begingroup\small}
 \renewcommand{\endisatagsmall}{\endgroup}