What is "Strip session id" ?
If you want to remove session IDs from pages while creating sitemap, enter your session string.

Example: http:www.yourdomainname.com/index.php?redirect=randomurl&action=dosomething
Like this URL > Enter Strip session id: "action" or "redirect" or both like this "action, redirect"

Where do I place my Sitemap?
Your sitemap must be renamed to sitemap.xml and uploaded to your root directory.

How big can my Sitemap be?
Sitemaps should be no larger than 10MB (10,485,760 bytes) and can contain a maximum of 50,000 URLs.

What do I do after I create my Sitemap?
Once you have created the Sitemap and placed it on your webserver, you can submit it to search engines that support the Sitemaps protocol. You can also create an account and log into www.google.com/webmasters and submit your sitemap there.

Some of the pages on my site use frames. Should I include the frameset URLs or the URLs of the frame contents?
Yes, include both URL's

Will the "priority" hint in the XML Sitemap change the ranking of my pages in search results?
The "priority" hint in your Sitemap only indicates the importance of a particular URL relative to other URLs on your own site and does not imply any effect on the ranking of your pages in search results.