I'm glad you like it and thanks for the extra info. I use this first for all my searches. It never occurred to me to use Cathy for searching my hard drive, I only ever tried it for CDs many years ago when I used to backup to them and I ended up getting too lazy to index them after I burnt them. I still have the download here somewhere.
Another really unusual programme that I use is called Tombo. All it does is read all the text files in a folder or subfolder and displays those files in a tree like layout. I use it for notes. You can create new "notes" from within Tombo and each is saved as individual .txt files so will always be accessible in the future - this is why I use it. You can also create new .txt files in the folder and it will find them.
I have version 1.17 which was a 325kb download zipped and it's about 700kb extracted. This is a link to download version 1.17
http://sourceforge.jp/projects/tombo...17_-_Notes.txt but on the home page there are beta versions which were done back in 2006 (it's an old programme)
http://tombo.sourceforge.jp/En/index.html There are screenshots at the second link. It's very simple but very convenient.