changing the "Modified" date of Windows files

I regualrly back up my Empegs to my PC. Until recently, I never noticed that a couple of my players had the wrong date set and were causing strange problems when sync'ing my PC backup files to other Empegs. Anyway, now I have the dates sorted out but some of the files on the PC still have wrong dates. Is there a way to change the dates on those files so they can be corrected. I did a total re-write from my "Master" Empeg to the PC but since the Empeg still has bad dates on the fids, so does the PC. Any ideas on how I can get back on track?

TurboNavigator can do that, it's freeware but it's a great programme so donate

http://www.turbonavigator.com

Looks like more people should have dontated to www.turbonavigator.com, the site is gone . Found it through Google though, thanks.

I use Synesis File Touch.