Change OS install file dates?

I built a WIN98 pc in November of last year. While installing the OS I
accidentally set the date to 11/11/13. I would like to change the dates
of all files dated 11/11/13 to 11/11/07. Is this possible? Is there a
freeware utility that might automate this task?

If I cannot find a reasonable method of changing the dates of these
files then I thought I might reinstalling the OS over the current
install and set the date to 11/11/07. Will this overwrite the registry
and all system files? Will I have to reinstall any currently installed
software? I don't have much software installed so reinstalling wouldn't
be difficult. Do you see any problems with this plan?

If I have to deltree the drive and reinstall the OS then so be it. I
just thought it might be a little easier to overwrite the existing
install. I thought this might save the hassle of reinstalling drivers
and everything else that needs to be done during a clean install. What
do you think?

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pcbldrNinetyEight