The time-tested "Freebie" SEO-Site-Augmentation package has now added automatic generation (and submission) of Google-format XML Sitemap files. If you are not already familiar with Freebie, it is a free (of course!) package that will augment any site by providing it with tens of thousands of perfectly legitimate ever-changing reasonably relevant pages with no ongoing effort on your part and only a very simple initial setup--and the pages are dynamic, so you're not storing thousands of individual files or a huge database. The pages it provides are Amazon and ABE book pages, which are selected (by a search phrase you choose) to be relevant to your site's theme. Because the package provides, in effect, a separate "bookshop" for each of the six national Amazon divisions, a few thousand titles are multipled 12 times (six Amazon divisions, and new and used versions). (You even stand to make a little income off the package if you are or enroll as an Amazon and ABE affiliate.) Just-released version 2.31 has, besides a few minor improvements, (including some to ease working with Windows-based servers), added automatic generation of sitemap files listing every page the package adds; that is important because, as Google itself says, their searchbots are not 100% reliable at following links to php-based files with parameter strings in their URLs. The package will update its sitemap files at every run (ideally daily) and even auto-submit a notice to Google that the files have changed. Also included in the package is a script for separately sitemapping your entire site, so your sitemaps can be complete: it maps all of your site except files or directories your robots.txt file disallows. (And as always, I will work with anyone installing or using the package who has questions or encounters any snag.) As an illustration, just the other day I brought a new site on line, and within hours Google showed over 22,000 indexed pages for it. While there is never any guarantee that even a large, dynamic set of pages will boost your site in the SERPs, it can't hurt (I have some augmented sites on page 1 of G's SERPs for their keywords). The package page is here.