Right-clicking a folder and selecting "Open" explores the folder in a new window. "Explore" being the default option, explores the folder in the same window. That's the only difference I can find between "Open" and "Explore" options. Both these options open a drive or folder in the two pane view.
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Regards,
Ramesh Srinivasan, Microsoft MVP [Windows XP Shell/User]
Windows® XP Troubleshooting
http://www.winhelponline.com
"WadeBart" <WadeBart@discussions.microsoft.com> wrote in message news

B06DF35-52E9-44DE-9F5A-7CDE537AE755@microsoft.com...
How do I change the default behavior of the double-click option on My
Computer from Open to Explore.
In Windows XP in was under Tools, Folder Options, File Types, n/a Folder.
Highlight Explore and set as default.