Edit the following file manually and change the path to the icons folder (it appears 2 times in the file)
File to edit:
\wamp\bin\apache\apache2.2.6\conf\extra\httpd-autoindex.conf
Change the paths:
C:/Program Files/Apache Software Foundation/Apache2.2/icons/
With your (adapt it to your directory installation) :
D:/wamp/bin/apache/apache2.2.6/icons/