MsnDesktopSearch

1. Add search of the following file types via registry:

1. .rb
2. .rbw
3. .pl

To index a file as text, add: HKEY_CLASSES_ROOT\.extension-name\PersistentHandler with default = REG_SZ {5e941d80-bf96-11cd-b579-08002b30bfeb}

See also IFilter Explorer.

Install Adobe-PDF-ifilter50.exe to enable PDF filtering.

From MSN http://communities2.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.msn.search&cat=en-us-msn&lang=en&cr=US

If you look closely, some of the extensions are linked to the Null Persistent Handler from query.dll.

According to http://msdn.microsoft.com/library/default.asp?url=/library/en-us/indexsrv/html/ixufilt_3z1u.asp :

"Binary or Null Filter When a registered binary file is encountered, the null filter (in query.dll) is used. The null filter retrieves only the system properties. The contents of a binary file are not filtered. Examples of system properties are FileName, LastWriteTime, FileSize, and Attributes."

"Enable Windows Compressed Folders" wouldn't do anything more for indexing .zip files. A proper IFilter is required for that (I'm working on one at the moment).