I am using a number of portable applications for pdf, doc, txt and other file types. So far as I can tell, they do not include file handlers.
Do I have to find file handlers for installable apps? Do I need only the file handler or the complete app? And how do I import the file handlers into FileSeek?
The file handlers need to be registered with Windows, so you'll need to either install the application (if the file handler comes bundled with the app), or install the standalone file handler. For example, Adobe provides standalone file handlers for searching PDF's (http://www.adobe.com/support/downloads/detail.jsp?ftpID=2611, and http://www.adobe.com/support/downloads/detail.jsp?ftpID=4025). Once you install those, FileSeek will automatically load them the next time it starts up.