Is to save all the information from your old web site on your Vista PC (if needed), remove the old web site, then re-upload the new web site fresh. That will prevent any conflicts.
FrontPage saves information on the PC (if you didn't change it otherwise) of which pages are up to date, etc, but by you uploading from a different computer, it doesn't have that information, so it will most likely try to upload everything. In that case, if some pages have the same name, it doesn't know to overwrite it or not. If you then overwrote some, and some not, it would be one giant mess. So I recommend to start off fresh, that way you know what's going on.
~Sovereign
I have a website and have created a new one on a different computer to be published to the same domain name. How's this done. I'm using FrontPage 2002 with Windows Vista. I tried publishing without deleting the old one thinking it would overwrite and ended up with a mess. I believe that each computer has a unique code that may have something to do with it. Any advice is appreciated.

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