But why you would not want all the vast improvements in Windows 7's and Vista's Explorer I don't know: things like the "breadcrumb" approach for the Address Bar; the extra panes available such as Search pane, Details pane, Preview pane; the customizable Favorite Links list in the Navigation pane; the ability to choose items for copying and moving etc. by putting check marks next to them; the built-in Instant Search in every window; the expanded view capabilities through sorting, grouping, stacking and filtering; the Task Tool Bar which varies according to folder contents; the optional Menu Bar as in previous OS versions; the optional successive indenting of nested folders in the navigation pane; the scrolling left or right of folders in the navigation pane to accommodate folder names too long to be fully displayed; the list goes on and on...
You can start up a second instance of Windows Explorer by right clicking on the folder you want to have a new windows explorer view of and selecting Open in New Window.