One tidbit: using the Windows Search dialog, it does not appear that you get the option to search through a catalog (hence the creation of this tool). If you setup your catalog to contain c:\program files\borland\delphi7\source as one of the directories, you get very fast search times if you specify that directory in the Search dialog. If you search from c:\, the search still takes a loooong time to execute. So, either you need to scope your searches, or download Steve's tool (with source) to search based on catalogs. Be sure to pay attention and setup a proper catalog structure!
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.