quick questions guys..

I have about 5 or 6 old 3-5GB outlook PST files that I'd like to be able to index and search quickly.   I've never found that Google Desktop Search would be able to index these old PST files - plus it is a crazy resource hog

that being said, do any of the desktop programs index/search these old pst files?  is something like copernic going to be less of a resource hog compared to GDS or microsoft's desktop search?

Are there any others?

thanks!