If you do not mind those four pages in PDF format, you can select the page range in the Print panel in either Pages '09 v4.3, or Pages v5, and then under the PDF submenu, select either Open in Preview (to confirm), or just Save to PDF. This is the easiest this four page process is going to get.
If you want four pages from the middle of your Pages document, then you cannot just select the thumbnail icon range that you want. You will need to open a new document (using the same template). In the source document click the thumbnail icon that represents the first page of the range to be copied. Click at the beginning of this page, and then continuously drag down to select the pages in the desired range. Use document page numbers as your guide, or a mental count of pages as they scroll up. When you stop, the thumbnail icon's blue background will be on the last page selected.
Copy your new selection, and paste (do not paste and match style) into the new document. Save it under a different name, or one with a memorable name formed from the original (e.g. foo_pp45_48.pages). You may wish to reindex the Page numbers in the new document to match those taken from the original document for easier content reference. In Pages v5, you click on the Toolbar document icon, and from that resulting panel, the Section tab. Here you can resequence the page numbers. In Pages '09 v4.3, page renumbering can be changed in the Layout Inspector's Section tab.