Hi,
  earlier infinite-mnkz publishd a feature to search in selected collections. I added to it the feature to search in selected material types also. the modified files are available in the patch section at http://sourceforge.net/tracker/index.php?func=detail&aid=1238779&group_id=50071&atid=458476
try it and convey your experience

Jack
visit me at http://www.jackeapen.org/