Anybody know of a good .chm viewer?

[largeinsd]

Hi, Wondering if anybody out there in Code Project land has a suggestion for a good chm viewer. In this case "Good" is defined as having good (perhaps great?) search functionality. I am using the default chm viewer that comes with Windows Vista and I am annoyed by the fact that it does not report sub string matches. I've also tried the Firefox plug in, but as far as I can tell that only searches the page currently loaded, so its functionality is not tolerable either. Thanks! - Jason