In the install.txt for Sitemaps & SEO, it mentions about the following 2 files and their respective location.
simple-sitemaps.php - goes in /wp-content/mu-plugins
sitemap.php - goes in /wp-content
How about the file all_in_one_seo_pack.php ?? - is it supposed to go somewhere ?
Also, are the sitemaps for the subblogs automatically generated just as the main site ?